Version 4
SHEET 1 880 896
WIRE -960 -32 -960 -64
WIRE -960 -32 -1040 -32
WIRE -1040 0 -1040 -32
WIRE -960 0 -960 -32
WIRE 224 0 192 0
WIRE 256 0 224 0
WIRE 256 96 256 0
WIRE -304 144 -592 144
WIRE -112 144 -304 144
WIRE 160 144 -32 144
WIRE 624 144 352 144
WIRE -592 176 -592 144
WIRE 624 176 624 144
WIRE 320 464 192 464
WIRE 320 512 320 464
WIRE 192 576 192 464
WIRE 144 592 80 592
WIRE -304 656 -304 144
WIRE 80 656 80 592
WIRE 80 656 -304 656
WIRE 144 656 80 656
WIRE 192 800 192 672
WIRE 256 800 192 800
WIRE 432 800 336 800
WIRE 464 800 432 800
FLAG 624 256 0
FLAG -592 256 0
FLAG 224 0 RightAtt
FLAG -1040 0 0
FLAG -960 -144 V+
FLAG -960 80 V-
FLAG 320 592 0
FLAG 432 800 RightAtt
SYMBOL voltage 624 160 R0
SYMATTR InstName V1
SYMATTR Value 0
SYMBOL voltage -592 160 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC 5
SYMATTR InstName V2
SYMATTR Value SINE(0 5 5 0)
SYMBOL res -128 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 20k
SYMBOL voltage -960 -160 R0
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL voltage -960 -16 R0
SYMATTR InstName V4
SYMATTR Value 12
SYMBOL voltage 320 496 R0
SYMATTR InstName V5
SYMATTR Value 3.3
SYMBOL res 240 816 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 100
SYMBOL pmos 144 672 M180
SYMATTR InstName M1
SYMATTR Value BSS84
SYMBOL SSI2161 240 144 R0
SYMATTR InstName U1
TEXT -384 -296 Left 2 !.tran 1