Version 4
SHEET 1 880 680
WIRE 192 96 192 48
WIRE 144 192 64 192
WIRE 192 192 192 176
WIRE 352 192 192 192
WIRE 192 208 192 192
WIRE 192 336 192 288
FLAG 64 192 SET
IOPIN 64 192 In
FLAG 192 48 UPPER
IOPIN 192 48 BiDir
FLAG 192 336 LOWER
IOPIN 192 336 BiDir
FLAG 352 192 MIDDLE
IOPIN 352 192 BiDir
SYMBOL res 176 80 R0
SYMATTR InstName R_a
SYMATTR Value R=VAL*(1-V(SET))
SYMBOL res 176 192 R0
SYMATTR InstName R_b
SYMATTR Value R=VAL*V(SET)