Version 4 SHEET 1 880 680 WIRE 448 32 96 32 WIRE 656 32 448 32 WIRE 656 128 656 32 WIRE 96 144 96 32 WIRE -400 160 -448 160 WIRE -128 160 -320 160 WIRE 64 160 -128 160 WIRE 448 160 448 32 WIRE 160 176 128 176 WIRE 320 176 240 176 WIRE 400 176 320 176 WIRE 64 192 16 192 WIRE 320 208 320 176 WIRE -448 240 -448 160 WIRE 448 272 448 256 WIRE 576 272 448 272 WIRE 576 288 576 272 WIRE 16 304 16 192 WIRE 160 304 16 304 WIRE 320 304 320 272 WIRE 320 304 240 304 WIRE 448 304 448 272 WIRE 448 304 320 304 WIRE -128 320 -128 160 WIRE 16 320 16 304 WIRE 448 336 448 304 WIRE -448 432 -448 320 WIRE -128 432 -128 384 WIRE -128 432 -448 432 WIRE 16 432 16 400 WIRE 16 432 -128 432 WIRE 96 432 96 208 WIRE 96 432 16 432 WIRE 448 432 448 400 WIRE 448 432 96 432 WIRE 576 432 576 368 WIRE 576 432 448 432 WIRE 656 432 656 208 WIRE 656 432 576 432 WIRE 96 464 96 432 FLAG 96 464 0 SYMBOL Opamps\\eigene\\LM324 96 112 R0 SYMATTR InstName U1 SYMBOL voltage 656 112 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL pmos 400 256 M180 SYMATTR InstName M1 SYMATTR Value Si4427DY SYMBOL res 256 288 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value {R_right} SYMBOL res 32 416 R180 WINDOW 0 36 76 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName R2 SYMATTR Value {R_left} SYMBOL polcap -144 320 R0 SYMATTR InstName C1 SYMATTR Value 2.2µ SYMBOL res -304 144 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 10K SYMBOL res 560 272 R0 SYMATTR InstName R4 SYMATTR Value 5 SYMBOL voltage -448 224 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value PULSE(0 5 0 0 0 1m 2m) SYMBOL res 256 160 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R5 SYMATTR Value 1K SYMBOL cap 336 272 R180 WINDOW 0 24 64 Left 0 WINDOW 3 24 8 Left 0 SYMATTR InstName C3 SYMATTR Value 10n TEXT -482 488 Left 0 !.tran 0.12 TEXT -488 512 Left 0 !.param R_left = 10k-R_right TEXT -488 536 Left 0 !.step param R_right 100 9900 400