Version 4 SHEET 1 1220 1128 WIRE -320 96 -320 64 WIRE -320 208 -320 176 WIRE -320 368 -320 336 WIRE -320 480 -320 448 WIRE -320 640 -320 608 WIRE -320 752 -320 720 WIRE -192 224 -192 80 WIRE -192 336 -320 336 WIRE -192 336 -192 224 WIRE -192 464 -192 336 WIRE -192 608 -192 464 WIRE -160 80 -192 80 WIRE -160 224 -192 224 WIRE -160 464 -192 464 WIRE -160 608 -192 608 WIRE -48 80 -80 80 WIRE -48 192 -48 80 WIRE -48 224 -96 224 WIRE -48 256 -48 224 WIRE -48 368 -48 336 WIRE -48 464 -80 464 WIRE -48 576 -48 464 WIRE -48 608 -96 608 WIRE -48 640 -48 608 WIRE -48 752 -48 720 WIRE 0 80 -48 80 WIRE 0 464 -48 464 WIRE 16 192 -48 192 WIRE 16 224 -48 224 WIRE 16 576 -48 576 WIRE 16 608 -48 608 WIRE 48 176 48 160 WIRE 48 256 48 240 WIRE 48 560 48 544 WIRE 48 640 48 624 WIRE 128 80 80 80 WIRE 128 208 80 208 WIRE 128 208 128 80 WIRE 128 464 80 464 WIRE 128 592 80 592 WIRE 128 592 128 464 WIRE 192 208 128 208 WIRE 192 208 192 80 WIRE 192 224 192 208 WIRE 192 592 128 592 WIRE 192 592 192 464 WIRE 192 608 192 592 WIRE 224 80 192 80 WIRE 224 224 192 224 WIRE 224 464 192 464 WIRE 224 608 192 608 WIRE 336 80 304 80 WIRE 336 192 336 80 WIRE 336 224 288 224 WIRE 336 256 336 224 WIRE 336 368 336 336 WIRE 336 464 304 464 WIRE 336 576 336 464 WIRE 336 608 288 608 WIRE 336 640 336 608 WIRE 336 752 336 720 WIRE 384 80 336 80 WIRE 384 464 336 464 WIRE 400 192 336 192 WIRE 400 224 336 224 WIRE 400 576 336 576 WIRE 400 608 336 608 WIRE 432 176 432 160 WIRE 432 256 432 240 WIRE 432 560 432 544 WIRE 432 640 432 624 WIRE 512 80 464 80 WIRE 512 208 464 208 WIRE 512 208 512 80 WIRE 512 464 464 464 WIRE 512 592 464 592 WIRE 512 592 512 464 WIRE 560 208 512 208 WIRE 560 592 512 592 FLAG -320 480 0 FLAG -320 208 0 FLAG -320 64 V+ FLAG 48 544 V+ FLAG 432 544 V+ FLAG 48 160 V+ FLAG 432 160 V+ FLAG 48 256 V- FLAG 432 256 V- FLAG 48 640 V- FLAG 432 640 V- FLAG 560 208 A IOPIN 560 208 Out FLAG 560 592 B IOPIN 560 592 Out FLAG 336 368 0 FLAG -48 368 0 FLAG -48 752 0 FLAG 336 752 0 FLAG -320 752 0 FLAG -320 608 V- SYMBOL voltage -320 80 R0 SYMATTR InstName V2 SYMATTR Value 6 SYMBOL voltage -320 624 R0 SYMATTR InstName V4 SYMATTR Value -6 SYMBOL res -176 96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R9 SYMATTR Value 10k SYMBOL res -16 96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R5 SYMATTR Value 10k SYMBOL res 208 96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL res 368 96 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R6 SYMATTR Value 10k SYMBOL res -176 480 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R11 SYMATTR Value 10k SYMBOL res -16 480 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL res 208 480 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R12 SYMATTR Value 10k SYMBOL res 368 480 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 0 56 VBottom 0 SYMATTR InstName R8 SYMATTR Value 10k SYMBOL res -64 240 R0 SYMATTR InstName R3 SYMATTR Value 4.7k SYMBOL res 320 240 R0 SYMATTR InstName R4 SYMATTR Value 96k SYMBOL res 320 624 R0 SYMATTR InstName R2 SYMATTR Value 497k SYMBOL res -64 624 R0 SYMATTR InstName R1 SYMATTR Value 23.8k SYMBOL cap -160 240 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C1 SYMATTR Value 4.7n SYMBOL cap 224 240 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C4 SYMATTR Value 4.7n SYMBOL cap 224 624 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C3 SYMATTR Value {C3} SYMBOL cap -160 624 R270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C2 SYMATTR Value 4.7n SYMBOL voltage -320 352 R0 WINDOW 123 24 132 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value2 AC 1 SYMATTR InstName V3 SYMATTR Value 0 SYMBOL Robertugo\\OPAMP5 48 528 R0 SYMATTR InstName U1 SYMATTR SpiceModel LM358 SYMBOL Robertugo\\OPAMP5 48 144 R0 SYMATTR InstName U2 SYMATTR SpiceModel LM358 SYMBOL Robertugo\\OPAMP5 432 144 R0 SYMATTR InstName U3 SYMATTR SpiceModel LM358 SYMBOL Robertugo\\OPAMP5 432 528 R0 SYMATTR InstName U4 SYMATTR SpiceModel LM358 TEXT -336 -80 Left 0 !.ac oct 50 20 20000 TEXT -336 -160 Left 0 ;.lib MC4558.sub TEXT -336 -40 Left 0 ;.STEP param C3 list 3.9n 4.7n 5.6n TEXT -336 -480 Left 0 ;A 90 degree Phase Shifter\nSchematic from John Woodgate. I couldn't resist to beautify it. :)\n \nHow to plot the phase difference of V(A) and V(B)?\nSolution: \nPlot V(A)/V(B) to get the phase difference in the waveform viewer. It's ok!\n \nPlot Ph(V(a))-Ph(V(b)) . It's wrong!\n \nThe models are in the Yahoo group: Files > Lib > MC4558 TEXT -336 -120 Left 0 !.param C3=4.7n