Version 4
SHEET 1 880 680
WIRE 144 128 32 128
WIRE 240 128 224 128
WIRE 272 128 240 128
WIRE 368 128 352 128
WIRE 400 128 368 128
WIRE 496 128 480 128
WIRE 528 128 496 128
WIRE 624 128 608 128
WIRE 32 176 32 128
WIRE 240 192 240 128
WIRE 368 192 368 128
WIRE 496 192 496 128
WIRE 624 192 624 128
WIRE 32 304 32 256
WIRE 240 304 240 272
WIRE 368 304 368 272
WIRE 496 304 496 272
WIRE 624 304 624 272
FLAG 240 304 0
FLAG 368 304 0
FLAG 496 304 0
FLAG 624 304 0
FLAG 32 304 0
FLAG 624 128 T4
FLAG 496 128 T3
FLAG 368 128 T2
FLAG 240 128 T1
FLAG 32 128 Vin
SYMBOL voltage 32 160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 40
SYMBOL res 240 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value {Rs}
SYMBOL res 368 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value {Rs}
SYMBOL res 496 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value {Rs}
SYMBOL res 624 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value {Rs}
SYMBOL res 224 176 R0
SYMATTR InstName R5
SYMATTR Value {Rq}
SYMBOL res 352 176 R0
SYMATTR InstName R6
SYMATTR Value {Rq}
SYMBOL res 480 176 R0
SYMATTR InstName R7
SYMATTR Value {Rq}
SYMBOL res 608 176 R0
SYMATTR InstName R8
SYMATTR Value {Rq}
TEXT 240 344 Left 2 !.param Rs=50k
TEXT 240 368 Left 2 !.param Rq=50k
TEXT -2 388 Left 2 !.tran 1