(kicad_sch
  (version 20230121)
  (generator eeschema)
  (uuid 1d0d66d3-5406-4346-8148-509f4d70fcad)
  (paper "A4")
  (title_block
    (title "OTA Ring Modulator")
    (company "EETree 电子森林 · CircuitJS 示例转换"))
  (lib_symbols
    (symbol "power:GND"
      (power)
      (pin_names (offset 0))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "#PWR"
        (at 0 -6.35 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Value" "GND"
        (at 0 -3.81 0)
        (effects (font (size 1.27 1.27))))
      (property "Footprint" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "global power"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "Power symbol creates a global label with name \"GND\" , ground"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "GND_0_1"
        (polyline
          (pts
            (xy 0 0)
            (xy 0 -1.27)
            (xy 1.27 -1.27)
            (xy 0 -2.54)
            (xy -1.27 -1.27)
            (xy 0 -1.27))
          (stroke (width 0) (type default))
          (fill (type none))))
      (symbol "GND_1_1"
        (pin power_in line hide
          (at 0 0 270)
          (length 0)
          (name "GND" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))))
    (symbol "power:+9V"
      (power)
      (pin_names (offset 0))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "#PWR"
        (at 0 -3.81 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Value" "+9V"
        (at 0 3.556 0)
        (effects (font (size 1.27 1.27))))
      (property "Footprint" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "global power"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "Power symbol creates a global label with name \"+9V\""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "+9V_0_1"
        (polyline
          (pts (xy -0.762 1.27) (xy 0 2.54))
          (stroke (width 0) (type default))
          (fill (type none)))
        (polyline
          (pts (xy 0 0) (xy 0 2.54))
          (stroke (width 0) (type default))
          (fill (type none)))
        (polyline
          (pts (xy 0 2.54) (xy 0.762 1.27))
          (stroke (width 0) (type default))
          (fill (type none))))
      (symbol "+9V_1_1"
        (pin power_in line hide
          (at 0 0 90)
          (length 0)
          (name "+9V" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))))
    (symbol "CircuitJS:PWR_33a034"
      (power)
      (pin_names (offset 0))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "#PWR"
        (at 0 -3.81 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Value" "-9V"
        (at 0 3.81 0)
        (effects (font (size 1.27 1.27))))
      (property "Footprint" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "global power"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "Power symbol creates a global label with name \"VEE\""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "PWR_33a034_0_1"
        (polyline
          (pts (xy 0 0) (xy 0 2.54))
          (stroke (width 0) (type default))
          (fill (type none)))
        (polyline
          (pts
            (xy 0.762 1.27)
            (xy -0.762 1.27)
            (xy 0 2.54)
            (xy 0.762 1.27))
          (stroke (width 0) (type default))
          (fill (type outline))))
      (symbol "PWR_33a034_1_1"
        (pin power_in line hide
          (at 0 0 90)
          (length 0)
          (name "-9V" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))))
    (symbol "Device:R"
      (pin_numbers hide)
      (pin_names (offset 0))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "R"
        (at 2.032 0 90)
        (effects (font (size 1.27 1.27))))
      (property "Value" "R"
        (at 0 0 90)
        (effects (font (size 1.27 1.27))))
      (property "Footprint" ""
        (at -1.778 0 90)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "~"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "R res resistor"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "Resistor"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_fp_filters" "R_*"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "R_0_1"
        (rectangle
          (start -1.016 -2.54)
          (end 1.016 2.54)
          (stroke (width 0.254) (type default))
          (fill (type none))))
      (symbol "R_1_1"
        (pin passive line
          (at 0 3.81 270)
          (length 1.27)
          (name "~" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))
        (pin passive line
          (at 0 -3.81 90)
          (length 1.27)
          (name "~" (effects (font (size 1.27 1.27))))
          (number "2" (effects (font (size 1.27 1.27)))))))
    (symbol "Device:C"
      (pin_numbers hide)
      (pin_names (offset 0.254))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "C"
        (at 0.635 2.54 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Value" "C"
        (at 0.635 -2.54 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Footprint" ""
        (at 0.9652 -3.81 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "~"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "cap capacitor"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "Unpolarized capacitor"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_fp_filters" "C_*"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "C_0_1"
        (polyline
          (pts (xy -2.032 -0.762) (xy 2.032 -0.762))
          (stroke (width 0.508) (type default))
          (fill (type none)))
        (polyline
          (pts (xy -2.032 0.762) (xy 2.032 0.762))
          (stroke (width 0.508) (type default))
          (fill (type none))))
      (symbol "C_1_1"
        (pin passive line
          (at 0 3.81 270)
          (length 2.794)
          (name "~" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))
        (pin passive line
          (at 0 -3.81 90)
          (length 2.794)
          (name "~" (effects (font (size 1.27 1.27))))
          (number "2" (effects (font (size 1.27 1.27)))))))
    (symbol "CircuitJS:box_a0e2ea62"
      (pin_numbers hide)
      (pin_names (offset 0.508))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "U"
        (at 0 0 0)
        (effects (font (size 1.27 1.27))))
      (property "Value" "OTA"
        (at 0 0 0)
        (effects (font (size 1.27 1.27))))
      (property "Footprint" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "box_a0e2ea62_0_1"
        (rectangle
          (start 1.27 3.81)
          (end 24.13 -3.81)
          (stroke (width 0.254) (type default))
          (fill (type background))))
      (symbol "box_a0e2ea62_1_1"
        (pin passive line
          (at 0.0 5.08 0)
          (length 1.27)
          (name "-" (effects (font (size 1.0 1.0))))
          (number "1" (effects (font (size 1.0 1.0)))))
        (pin passive line
          (at 0.0 -5.08 0)
          (length 1.27)
          (name "+" (effects (font (size 1.0 1.0))))
          (number "2" (effects (font (size 1.0 1.0)))))
        (pin passive line
          (at 0.0 0.0 0)
          (length 1.27)
          (name "ABC" (effects (font (size 1.0 1.0))))
          (number "3" (effects (font (size 1.0 1.0)))))
        (pin passive line
          (at 22.86 5.08 270)
          (length 1.27)
          (name "BIAS" (effects (font (size 1.0 1.0))))
          (number "4" (effects (font (size 1.0 1.0)))))
        (pin passive line
          (at 25.4 0.0 180)
          (length 1.27)
          (name "OUT" (effects (font (size 1.0 1.0))))
          (number "5" (effects (font (size 1.0 1.0)))))))
    (symbol "Device:Q_NPN_Darlington_BCE"
      (pin_numbers hide)
      (pin_names (offset 0) hide)
      (in_bom yes)
      (on_board yes)
      (property "Reference" "Q"
        (at 4.572 1.27 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Value" "Q_NPN_Darlington_BCE"
        (at 4.572 -1.27 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Footprint" ""
        (at 5.08 2.54 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "~"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "transistor NPN Darlington"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "NPN Darlington transistor, base/collector/emitter"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "Q_NPN_Darlington_BCE_0_1"
        (polyline
          (pts (xy 0.635 0.635) (xy 2.54 2.54))
          (stroke (width 0) (type default))
          (fill (type none)))
        (polyline
          (pts
            (xy 0.635 -0.635)
            (xy 2.54 -2.54)
            (xy 2.54 -2.54))
          (stroke (width 0) (type default))
          (fill (type none)))
        (polyline
          (pts (xy 0.635 0) (xy 2.54 1.905) (xy 2.54 2.54))
          (stroke (width 0) (type default))
          (fill (type none)))
        (polyline
          (pts
            (xy 0.635 1.905)
            (xy 0.635 -1.905)
            (xy 0.635 -1.905))
          (stroke (width 0.508) (type default))
          (fill (type none)))
        (polyline
          (pts
            (xy 1.27 -1.778)
            (xy 1.778 -1.27)
            (xy 2.286 -2.286)
            (xy 1.27 -1.778)
            (xy 1.27 -1.778))
          (stroke (width 0) (type default))
          (fill (type outline)))
        (circle
          (center 1.27 0)
          (radius 2.8194)
          (stroke (width 0.254) (type default))
          (fill (type none))))
      (symbol "Q_NPN_Darlington_BCE_1_1"
        (pin input line
          (at -5.08 0 0)
          (length 5.715)
          (name "B" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))
        (pin passive line
          (at 2.54 5.08 270)
          (length 2.54)
          (name "C" (effects (font (size 1.27 1.27))))
          (number "2" (effects (font (size 1.27 1.27)))))
        (pin passive line
          (at 2.54 -5.08 90)
          (length 2.54)
          (name "E" (effects (font (size 1.27 1.27))))
          (number "3" (effects (font (size 1.27 1.27)))))))
    (symbol "Simulation_SPICE:VPWL"
      (pin_numbers hide)
      (pin_names (offset 0.0254))
      (in_bom yes)
      (on_board yes)
      (property "Reference" "V"
        (at 2.54 2.54 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Value" "VPWL"
        (at 2.54 0 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Footprint" ""
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Datasheet" "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec_Independent_Sources_for"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Sim.Pins" "1=+ 2=-"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "Sim.Device" "V"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) (justify left) hide))
      (property "Sim.Params" "pwl=\"0 -1 50n -1 51n 0 97n 1 171n -1 200n -1\""
        (at 2.54 -2.54 0)
        (effects (font (size 1.27 1.27)) (justify left)))
      (property "Sim.Type" "PWL"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_keywords" "simulation"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (property "ki_description" "Voltage source, piece-wise linear"
        (at 0 0 0)
        (effects (font (size 1.27 1.27)) hide))
      (symbol "VPWL_0_0"
        (polyline
          (pts
            (xy -1.778 -1.016)
            (xy -0.762 1.016)
            (xy -0.254 0)
            (xy 0.762 0)
            (xy 1.27 1.27))
          (stroke (width 0) (type default))
          (fill (type none)))
        (text "+"
          (at 0 1.905 0)
          (effects (font (size 1.27 1.27)))))
      (symbol "VPWL_0_1"
        (circle
          (center 0 0)
          (radius 2.54)
          (stroke (width 0.254) (type default))
          (fill (type background))))
      (symbol "VPWL_1_1"
        (pin passive line
          (at 0 5.08 270)
          (length 2.54)
          (name "~" (effects (font (size 1.27 1.27))))
          (number "1" (effects (font (size 1.27 1.27)))))
        (pin passive line
          (at 0 -5.08 90)
          (length 2.54)
          (name "~" (effects (font (size 1.27 1.27))))
          (number "2" (effects (font (size 1.27 1.27))))))))
  (junction
    (at 78.74 58.42)
    (diameter 0)
    (color 0 0 0 0)
    (uuid 7633a039-931b-4c02-90d5-5db3dc17d4d8))
  (junction
    (at 50.8 81.28)
    (diameter 0)
    (color 0 0 0 0)
    (uuid 4ecb895b-d396-46f5-b6d7-fb03eeeb8655))
  (junction
    (at 27.94 63.5)
    (diameter 0)
    (color 0 0 0 0)
    (uuid ca17ee4d-26bd-46cc-9604-6aceae9af101))
  (junction
    (at 50.8 63.5)
    (diameter 0)
    (color 0 0 0 0)
    (uuid 08735b96-b59c-4749-870b-376a7a08aaf4))
  (wire
    (pts (xy 76.2 58.42) (xy 78.74 58.42))
    (stroke (width 0) (type default))
    (uuid 6877e1b6-438a-4bd1-ad7c-3f4e00ce8722))
  (wire
    (pts (xy 78.74 58.42) (xy 81.28 58.42))
    (stroke (width 0) (type default))
    (uuid f1a710f9-3fad-4e0b-8a0a-7800eb8a997d))
  (wire
    (pts (xy 50.8 81.28) (xy 78.74 81.28))
    (stroke (width 0) (type default))
    (uuid 9cb12231-e3f4-48a1-bdd6-d4dd3e183a25))
  (wire
    (pts (xy 27.94 53.34) (xy 27.94 63.5))
    (stroke (width 0) (type default))
    (uuid 024ef54e-d9e9-471b-9a36-edd245f05747))
  (wire
    (pts (xy 50.8 58.42) (xy 48.26 58.42))
    (stroke (width 0) (type default))
    (uuid 3e3683f4-0469-47fb-9a1a-1214f87d391a))
  (wire
    (pts (xy 91.44 35.56) (xy 91.44 55.88))
    (stroke (width 0) (type default))
    (uuid 8dc682e2-f617-49eb-8f3e-d6b9b42f26bd))
  (wire
    (pts (xy 73.66 48.26) (xy 73.66 53.34))
    (stroke (width 0) (type default))
    (uuid 523f427e-4f65-4421-81c2-97a4d6642038))
  (wire
    (pts (xy 48.26 35.56) (xy 48.26 30.48))
    (stroke (width 0) (type default))
    (uuid 04e76149-765f-48ed-a241-3d3448bf9629))
  (wire
    (pts (xy 91.44 81.28) (xy 91.44 86.36))
    (stroke (width 0) (type default))
    (uuid 0ea6f28f-f902-48bb-85db-26d7fe21d975))
  (wire
    (pts (xy 91.44 35.56) (xy 91.44 30.48))
    (stroke (width 0) (type default))
    (uuid ada6e5c2-8757-4295-8bce-300c761f2b17))
  (wire
    (pts (xy 78.74 66.04) (xy 78.74 58.42))
    (stroke (width 0) (type default))
    (uuid 8ef77b14-e28b-4719-be31-ec90900dfba2))
  (wire
    (pts (xy 78.74 73.66) (xy 78.74 81.28))
    (stroke (width 0) (type default))
    (uuid 55a624b7-d10b-4753-a827-434e5b1a9162))
  (wire
    (pts (xy 50.8 68.58) (xy 50.8 63.5))
    (stroke (width 0) (type default))
    (uuid 322e74c8-834b-4492-a138-3a1105c715d1))
  (wire
    (pts (xy 50.8 76.2) (xy 50.8 81.28))
    (stroke (width 0) (type default))
    (uuid dab86653-1e8c-4450-85c4-7a371cb604d4))
  (wire
    (pts (xy 48.26 81.28) (xy 50.8 81.28))
    (stroke (width 0) (type default))
    (uuid 69e4781e-1cb8-4a2b-ad63-2ecb8c96d736))
  (wire
    (pts (xy 40.64 81.28) (xy 38.1 81.28))
    (stroke (width 0) (type default))
    (uuid c7aaae02-e66d-4793-9c24-4afa76dd8bd8))
  (wire
    (pts (xy 43.18 63.5) (xy 50.8 63.5))
    (stroke (width 0) (type default))
    (uuid 4a66823b-1d2e-403e-b0aa-f49028ef3bd3))
  (wire
    (pts (xy 35.56 63.5) (xy 27.94 63.5))
    (stroke (width 0) (type default))
    (uuid 2efe9938-c593-4200-bcfc-2f51fd7d56f9))
  (wire
    (pts (xy 43.18 53.34) (xy 50.8 53.34))
    (stroke (width 0) (type default))
    (uuid 6146b487-c312-46db-a491-fc0f924866f0))
  (wire
    (pts (xy 35.56 53.34) (xy 27.94 53.34))
    (stroke (width 0) (type default))
    (uuid 7f427916-020f-468b-a8e7-b712f428461c))
  (wire
    (pts (xy 48.26 50.8) (xy 48.26 58.42))
    (stroke (width 0) (type default))
    (uuid f9d8d7d8-9f89-4b05-801e-5457c84b904c))
  (wire
    (pts (xy 48.26 43.18) (xy 48.26 35.56))
    (stroke (width 0) (type default))
    (uuid a5684c00-5dec-4876-900b-1b7f591261fe))
  (wire
    (pts (xy 91.44 67.31) (xy 91.44 60.96))
    (stroke (width 0) (type default))
    (uuid f89d5064-1b7c-459b-8689-a055c32fb420))
  (wire
    (pts (xy 91.44 74.93) (xy 91.44 81.28))
    (stroke (width 0) (type default))
    (uuid 80ef9c9c-5ba9-4fa1-896b-5da0c48f661f))
  (wire
    (pts (xy 73.66 39.37) (xy 73.66 38.1))
    (stroke (width 0) (type default))
    (uuid bc23e585-ac0a-49de-a714-62100dd8707b))
  (wire
    (pts (xy 73.66 46.99) (xy 73.66 48.26))
    (stroke (width 0) (type default))
    (uuid 9a885bc4-a1b4-4766-9bd0-b5dac012c43e))
  (wire
    (pts (xy 83.82 58.42) (xy 81.28 58.42))
    (stroke (width 0) (type default))
    (uuid 71dc996c-06ca-4c93-8408-3f357510b9ce))
  (wire
    (pts (xy 91.44 53.34) (xy 91.44 55.88))
    (stroke (width 0) (type default))
    (uuid a4b80a74-6c9f-4738-a79a-2e644105ce77))
  (wire
    (pts (xy 91.44 63.5) (xy 91.44 60.96))
    (stroke (width 0) (type default))
    (uuid ed52d3a6-19f6-4a5f-98bc-7c446863b11c))
  (symbol
    (lib_id "power:GND")
    (at 27.94 63.5 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 9c15862b-68df-426b-a14c-e3e0f63ac32d)
    (property "Reference" "#PWR001"
      (at 27.94 63.5 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Value" "GND"
      (at 27.94 63.5 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Footprint" ""
      (at 27.94 63.5 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 48a74a89-df60-4bde-a596-41334b9c7491))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "#PWR001")
          (unit 1)))))
  (symbol
    (lib_id "power:+9V")
    (at 48.26 30.48 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid f8328caf-633b-48b2-bfde-e418233a666e)
    (property "Reference" "#PWR002"
      (at 48.26 30.48 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Value" "+9V"
      (at 48.26 26.9875 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 48.26 30.48 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 00c82094-c213-4363-9b76-d4d63e6fd2fd))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "#PWR002")
          (unit 1)))))
  (symbol
    (lib_id "CircuitJS:PWR_33a034")
    (at 91.44 86.36 180)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 0986749e-a3fc-4a1e-9c67-d6dd79ddac60)
    (property "Reference" "#PWR003"
      (at 91.44 86.36 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Value" "-9V"
      (at 91.44 89.8525 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 91.44 86.36 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 56c49730-7113-49a1-8184-796683d56a7a))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "#PWR003")
          (unit 1)))))
  (symbol
    (lib_id "power:+9V")
    (at 91.44 30.48 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid d13df748-e4a0-4fa3-849c-28870f5f6f06)
    (property "Reference" "#PWR004"
      (at 91.44 30.48 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Value" "+9V"
      (at 91.44 26.9875 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 91.44 30.48 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 21f8e8e1-6f97-435c-8b4d-8c58c29ea06e))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "#PWR004")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 78.74 69.85 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid fc31b2b4-8fc1-4915-904d-ec7706d991f6)
    (property "Reference" "R1"
      (at 83.02625 69.05625 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "33kΩ"
      (at 83.02625 70.64375 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 78.74 69.85 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 6a6cf4c0-6db7-4925-aa3d-b0d9e3b08915))
    (pin "2" (uuid 490830ea-7294-4253-bf93-aea9bdd59b20))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R1")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 50.8 72.39 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 144589b9-c1cb-4a05-83fc-969b9952966e)
    (property "Reference" "R2"
      (at 55.08625 71.59625 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "18kΩ"
      (at 55.08625 73.18375 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 50.8 72.39 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 70d0a725-59da-4738-89c1-6c04ef92155d))
    (pin "2" (uuid b5306739-676c-41d8-b996-2cb5498feaa1))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R2")
          (unit 1)))))
  (symbol
    (lib_id "Device:C")
    (at 44.45 81.28 270)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 7819eaa3-4bfd-438c-9739-474cbd352efb)
    (property "Reference" "C1"
      (at 44.45 76.04125 90)
      (effects (font (size 1.27 1.27))))
    (property "Value" "10µF"
      (at 44.45 77.62875 90)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 44.45 81.28 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 4e0385a9-1eb8-4424-b3ba-bc65a6124d1f))
    (pin "2" (uuid 1423633a-4868-4f85-955b-e71191f4ed3f))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "C1")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 39.37 63.5 270)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 1ec54172-d5b4-49d3-8c9e-00b119416c66)
    (property "Reference" "R3"
      (at 39.37 59.3725 90)
      (effects (font (size 1.27 1.27))))
    (property "Value" "470Ω"
      (at 39.37 60.96 90)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 39.37 63.5 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid c6571d5e-db19-4716-bc31-caa23dd41c20))
    (pin "2" (uuid e6baf0c0-7eaa-4b11-b9d0-de1ee58145a0))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R3")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 39.37 53.34 270)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 5a401222-769f-4592-a34a-2dd0d4f30921)
    (property "Reference" "R4"
      (at 39.37 49.2125 90)
      (effects (font (size 1.27 1.27))))
    (property "Value" "470Ω"
      (at 39.37 50.8 90)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 39.37 53.34 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 4d1170b3-1130-4ea5-bbe7-117320a42bf9))
    (pin "2" (uuid 867cd1ab-a326-48c8-bd12-5cb7c195d63c))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R4")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 48.26 46.99 180)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid ac7b123a-a28a-4ec7-ac6b-654b9b9a4a26)
    (property "Reference" "R5"
      (at 52.54625 46.19625 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "10kΩ"
      (at 52.54625 47.78375 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 48.26 46.99 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 0f00a8d6-05ab-45ac-971a-4ca429ccc9ba))
    (pin "2" (uuid 39ed630a-3ffc-407b-8175-ee7e26d9dcfc))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R5")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 91.44 71.12 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 46c37729-76ef-43d8-bab6-f505fe28ab01)
    (property "Reference" "R6"
      (at 96.2025 70.32625 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "4.7kΩ"
      (at 96.2025 71.91375 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 91.44 71.12 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid dbce34da-7884-4356-b4b5-365a1f44c2ad))
    (pin "2" (uuid 75f7a1c8-af6d-4b33-a985-168f3b6e1069))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R6")
          (unit 1)))))
  (symbol
    (lib_id "Device:R")
    (at 73.66 43.18 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 514f6d2c-5089-461f-8746-4317d6acc90c)
    (property "Reference" "R7"
      (at 77.94625 42.38625 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "20kΩ"
      (at 77.94625 43.97375 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 73.66 43.18 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 19604205-7d4d-4257-a37f-df5e0a2c6b16))
    (pin "2" (uuid 6e6cfd4d-d5d4-4ffe-956a-9ed2820b0791))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "R7")
          (unit 1)))))
  (symbol
    (lib_id "CircuitJS:box_a0e2ea62")
    (at 50.8 58.42 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 5f05acb7-ade3-461e-8c35-feccf4b166e0)
    (property "Reference" "U1"
      (at 77.62875 52.86375 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "OTA"
      (at 77.62875 54.45125 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 50.8 58.42 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 380c7829-1719-40c1-aa96-30a6c295d90f))
    (pin "2" (uuid b2520459-1826-43df-a436-42ed907a7c38))
    (pin "3" (uuid 32ee24b6-be0b-4e2b-94bf-3b14caa3e247))
    (pin "4" (uuid 68352c0f-d395-47e6-b7df-445f4830d73b))
    (pin "5" (uuid 533afca3-42ce-4882-825e-63b7b2b886d2))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "U1")
          (unit 1)))))
  (symbol
    (lib_id "Device:Q_NPN_Darlington_BCE")
    (at 88.9 58.42 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid e3b0eb87-8009-4b07-a9fe-9039f178be89)
    (property "Reference" "Q1"
      (at 95.25 58.42 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" ""
      (at 88.9 58.42 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Footprint" ""
      (at 88.9 58.42 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid d6694ee3-7f4b-4616-b0f0-952d9f93740c))
    (pin "2" (uuid 3a8b58f1-8ecb-4e5d-a8c2-9e3057724b3a))
    (pin "3" (uuid d88fd812-d40c-43e6-ae23-96ad3f5815d7))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "Q1")
          (unit 1)))))
  (symbol
    (lib_id "Simulation_SPICE:VPWL")
    (at 33.02 81.28 270)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 9d87e42b-b2e1-4ec3-b5fb-148b6a966bda)
    (property "Reference" "V1"
      (at 33.02 75.565 90)
      (effects (font (size 1.27 1.27))))
    (property "Value" "1V 40Hz"
      (at 33.02 77.1525 90)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 33.02 81.28 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 01a4f552-64ef-4861-b2f4-12ef3753ece9))
    (pin "2" (uuid c32fe2a5-abd0-45cc-853a-a15b61f60313))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "V1")
          (unit 1)))))
  (symbol
    (lib_id "power:GND")
    (at 27.94 81.28 270)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 0c327179-1ed6-4f7a-95db-c18e1f571afa)
    (property "Reference" "#PWR005"
      (at 27.94 81.28 90)
      (effects (font (size 1.27 1.27)) hide))
    (property "Value" "GND"
      (at 27.94 81.28 90)
      (effects (font (size 1.27 1.27)) hide))
    (property "Footprint" ""
      (at 27.94 81.28 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid 2ff285a1-573f-4df8-b781-0f63d5b13174))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "#PWR005")
          (unit 1)))))
  (symbol
    (lib_id "Simulation_SPICE:VPWL")
    (at 73.66 33.02 180)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 8ab8a977-a49e-4b2e-9dec-1f4e2472b51c)
    (property "Reference" "V2"
      (at 81.12125 32.22625 0)
      (effects (font (size 1.27 1.27))))
    (property "Value" "10V 5Hz"
      (at 81.12125 33.81375 0)
      (effects (font (size 1.27 1.27))))
    (property "Footprint" ""
      (at 73.66 33.02 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid e789246a-70d2-471b-9613-87c79c919a3c))
    (pin "2" (uuid c57f987a-603a-4b07-8aeb-31c453dddc79))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "V2")
          (unit 1)))))
  (symbol
    (lib_id "power:GND")
    (at 73.66 27.94 180)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp no)
    (uuid 72f46d14-c1fe-4c55-96ed-aa36c75c95ae)
    (property "Reference" "#PWR006"
      (at 73.66 27.94 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Value" "GND"
      (at 73.66 27.94 0)
      (effects (font (size 1.27 1.27)) hide))
    (property "Footprint" ""
      (at 73.66 27.94 0)
      (effects (font (size 1.27 1.27)) hide))
    (pin "1" (uuid fb04356e-0999-4bdf-bd80-dea7e75d1334))
    (instances
      (project "ota-ringmod"
        (path "/cb9eb368-6010-400e-98b4-5be8c7426430"
          (reference "#PWR006")
          (unit 1)))))
  (sheet_instances (path "/" (page "1"))))