Version 4 SHEET 1 880 680 WIRE 0 -48 0 -64 WIRE 128 -48 128 -64 WIRE -144 0 -160 0 WIRE 48 0 -80 0 WIRE 432 32 368 32 WIRE -160 64 -160 0 WIRE -48 64 -160 64 WIRE 48 64 48 0 WIRE 48 64 16 64 WIRE 112 64 48 64 WIRE 240 96 208 96 WIRE 320 96 304 96 WIRE 368 96 368 32 WIRE 368 96 320 96 WIRE 464 112 448 112 WIRE 544 112 528 112 WIRE -256 176 -272 176 WIRE -160 176 -160 64 WIRE -160 176 -176 176 WIRE -128 176 -160 176 WIRE -80 176 -128 176 WIRE 16 192 -16 192 WIRE 48 192 48 64 WIRE 48 192 16 192 WIRE 80 192 48 192 WIRE 208 192 208 96 WIRE 208 192 160 192 WIRE 224 192 208 192 WIRE -80 208 -112 208 WIRE 320 208 320 96 WIRE 320 208 288 208 WIRE 336 208 320 208 WIRE 448 208 448 112 WIRE 448 208 416 208 WIRE 464 208 448 208 WIRE -112 224 -112 208 WIRE 224 224 192 224 WIRE 544 224 544 112 WIRE 544 224 528 224 WIRE 576 224 544 224 WIRE 592 224 576 224 WIRE 192 240 192 224 WIRE 464 240 432 240 WIRE 432 256 432 240 WIRE -272 304 -272 176 WIRE 544 304 544 224 WIRE 544 304 -272 304 FLAG 0 -48 0 FLAG 128 -48 0 FLAG 0 -144 vp FLAG 128 -144 vn FLAG -48 160 vp FLAG 256 176 vp FLAG 496 192 vp FLAG -48 224 vn FLAG 256 240 vn FLAG 496 256 vn FLAG 432 256 0 FLAG 192 240 0 FLAG -112 224 0 FLAG 576 224 Sine FLAG 16 192 U1O FLAG 320 96 U2O FLAG -128 176 U1I FLAG 432 32 Triangle FLAG 112 64 Square SYMBOL voltage 0 -160 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 WINDOW 0 24 20 Left 0 WINDOW 3 29 84 Left 0 SYMATTR InstName V1 SYMATTR Value 15 SYMBOL voltage 128 -48 R180 WINDOW 0 24 93 Left 0 WINDOW 3 27 28 Left 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 15 SYMBOL res 176 176 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value {rv} SYMBOL res 432 192 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R2 SYMATTR Value {rv} SYMBOL res -160 160 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL cap 304 80 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL cap 528 96 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL diode -48 48 M90 WINDOW 0 0 32 VBottom 0 WINDOW 3 41 36 VTop 0 SYMATTR InstName D3 SYMATTR Value 1N4148 SYMBOL diode -80 -16 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 38 26 VTop 0 SYMATTR InstName D4 SYMATTR Value 1N4148 SYMBOL OPAMPS\\LT1057 -48 128 R0 SYMATTR InstName U1 SYMBOL OPAMPS\\LT1057 256 144 R0 SYMATTR InstName U2 SYMBOL OPAMPS\\LT1057 496 160 R0 SYMATTR InstName U3 TEXT 200 -48 Left 0 !.tran 0 20 1m 1m TEXT 200 -96 Left 0 !;.step param rv 10k 110k 10k TEXT 8 -200 Left 0 ;Sine Square Triangle Oscillator TEXT 200 -128 Left 0 !.param rv 100k TEXT 200 -160 Left 0 !.IC v(U1I) 1u