Version 4 SHEET 1 880 680 WIRE 128 16 32 16 WIRE 368 16 128 16 WIRE 32 48 32 16 WIRE 368 48 368 16 WIRE 240 96 128 96 WIRE 304 96 240 96 WIRE 32 176 32 128 WIRE 64 176 32 176 WIRE 176 176 144 176 WIRE 288 176 176 176 WIRE 368 176 368 144 WIRE 32 256 32 176 WIRE 80 256 32 256 WIRE 176 256 176 176 WIRE 176 256 144 256 WIRE 240 256 240 96 WIRE 368 272 368 176 WIRE 32 320 32 256 WIRE 112 320 96 320 WIRE 176 320 176 256 WIRE 192 320 176 320 WIRE 240 368 240 352 WIRE 368 368 368 352 WIRE 368 368 240 368 WIRE 368 400 368 368 WIRE 32 416 32 320 WIRE 112 416 96 416 WIRE 176 416 176 320 WIRE 32 480 32 416 WIRE 368 480 32 480 WIRE 32 496 32 480 FLAG 32 496 0 SYMBOL voltage 32 32 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value PULSE(9 9.1 0 0 0 0 1µ 5) SYMBOL pnp 304 144 M180 SYMATTR InstName Q1 SYMBOL res 112 0 R0 SYMATTR InstName R1 SYMATTR Value 330 SYMBOL res 384 160 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 20k SYMBOL res 384 368 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R3 SYMATTR Value 220 SYMBOL res 384 496 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 220 SYMBOL ind 160 160 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName L1 SYMATTR Value 1µ SYMBOL cap 144 240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 1n SYMBOL diode 96 304 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D1 SYMBOL diode 176 304 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D2 SYMBOL diode 32 400 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D3 SYMBOL diode 112 400 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D4 SYMBOL njf 192 256 R0 SYMATTR InstName J1 SYMATTR Value U309 TEXT -512 136 Left 2 ;NICOS Negative Impedance Converter Oscillator\nhttps://www.mikrocontroller.net/topic/436039 TEXT -298 224 Left 2 !.tran 2m