Version 4 SHEET 1 880 680 WIRE -208 -64 -384 -64 WIRE -64 -64 -208 -64 WIRE -208 -48 -208 -64 WIRE -64 -48 -64 -64 WIRE -384 -32 -384 -64 WIRE 288 0 224 0 WIRE 368 0 288 0 WIRE 368 16 368 0 WIRE -384 64 -384 48 WIRE -208 64 -208 32 WIRE 160 64 -208 64 WIRE -64 96 -64 32 WIRE 224 144 224 0 WIRE 160 160 160 64 WIRE 192 160 160 160 WIRE 352 176 256 176 WIRE 544 176 352 176 WIRE 608 176 544 176 WIRE -64 192 -64 176 WIRE 128 192 -64 192 WIRE 160 192 128 192 WIRE 192 192 160 192 WIRE -464 208 -512 208 WIRE -64 208 -64 192 WIRE 544 208 544 176 WIRE -512 240 -512 208 WIRE -208 272 -208 64 WIRE 160 272 160 192 WIRE 256 272 160 272 WIRE 352 272 352 176 WIRE 352 272 336 272 WIRE -64 304 -64 288 WIRE 544 304 544 288 WIRE -512 336 -512 320 WIRE -208 400 -208 352 WIRE -128 400 -208 400 WIRE -64 400 -64 384 WIRE -64 400 -128 400 WIRE -128 416 -128 400 FLAG 224 208 0 FLAG 368 96 0 FLAG -384 64 0 FLAG 608 176 out FLAG 288 0 d FLAG -128 416 0 FLAG -512 336 0 FLAG -464 208 s FLAG 544 304 0 FLAG 160 64 i FLAG 128 192 ni SYMBOL Opamps\\opamp2 224 112 R0 WINDOW 3 29 96 Left 2 SYMATTR InstName U1 SYMATTR Value LM324 SYMBOL voltage 368 0 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage -384 -48 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 5 SYMBOL res -224 -64 R0 SYMATTR InstName R1 SYMATTR Value R=V(s) SYMBOL res -224 256 R0 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL res -80 -64 R0 SYMATTR InstName R3 SYMATTR Value 120K SYMBOL res -80 288 R0 SYMATTR InstName R4 SYMATTR Value 56K SYMBOL res -80 80 R0 SYMATTR InstName R5t SYMATTR Value {(1-w)*100K} SYMBOL res -80 192 R0 SYMATTR InstName R5b SYMATTR Value {w*100K} SYMBOL res 240 288 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R6 SYMATTR Value 6.8Meg SYMBOL voltage -512 224 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value PWL(0 5K 1 20K 2 5K) SYMBOL res 528 192 R0 SYMATTR InstName R7 SYMATTR Value 10K TEXT 168 400 Left 2 !.lib LM324.txt TEXT 168 368 Left 2 !.param w = 0.5 TEXT -402 388 Left 2 !.tran 2