Version 4
SHEET 1 880 680
WIRE 16 -32 16 -80
WIRE 480 16 480 -16
WIRE 480 16 384 16
WIRE 560 16 480 16
WIRE 384 32 384 16
WIRE 560 32 560 16
WIRE 16 112 16 48
WIRE 384 144 384 112
WIRE 384 144 352 144
WIRE 560 144 560 112
WIRE 592 144 560 144
WIRE 384 176 384 144
WIRE 560 176 560 144
WIRE 384 288 384 256
WIRE 480 288 384 288
WIRE 560 288 560 256
WIRE 560 288 480 288
WIRE 480 304 480 288
WIRE 480 432 480 384
FLAG 16 -80 Vcc
IOPIN 16 -80 Out
FLAG 16 112 0
FLAG 480 -96 Vcc
IOPIN 480 -96 Out
FLAG 480 432 0
FLAG 592 144 V+
FLAG 352 144 V-
SYMBOL res 464 -112 R0
SYMATTR InstName R1
SYMATTR Value 330
SYMBOL res 368 16 R0
SYMATTR InstName R2
SYMATTR Value 120
SYMBOL res 544 16 R0
SYMATTR InstName R3
SYMATTR Value {240-X}
SYMBOL res 368 160 R0
SYMATTR InstName R4
SYMATTR Value 120
SYMBOL res 544 160 R0
SYMATTR InstName R5
SYMATTR Value {X}
SYMBOL res 464 288 R0
SYMATTR InstName R6
SYMATTR Value 330
SYMBOL voltage 16 -48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 3.3
TEXT -96 248 Left 2 !.save V(V+,V-)\n.step param X 119 121 0.1\n.measure VoutAvg AVG V(V+,V-)\n.option plotwinsize=0 numdgt=15
TEXT -88 376 Left 2 !.tran 0 510m 500m