Version 4
SHEET 1 908 680
WIRE 256 -160 112 -160
WIRE 368 -160 336 -160
WIRE 0 -64 -32 -64
WIRE 112 -64 112 -160
WIRE 112 -64 80 -64
WIRE 112 -48 112 -64
WIRE 256 -48 112 -48
WIRE -32 -32 -32 -64
WIRE -32 -32 -64 -32
WIRE 368 -32 368 -160
WIRE 368 -32 320 -32
WIRE 400 -32 368 -32
WIRE 144 -16 112 -16
WIRE 256 -16 224 -16
WIRE -32 0 -32 -32
WIRE 0 0 -32 0
WIRE 112 0 112 -16
WIRE 112 0 80 0
WIRE -64 48 -64 -32
WIRE 112 48 112 0
WIRE 208 48 208 32
WIRE 208 48 112 48
WIRE 112 64 112 48
WIRE 160 80 160 32
WIRE -64 160 -64 112
WIRE 112 160 112 144
FLAG 432 160 0
FLAG 432 80 V+
FLAG 528 160 0
FLAG 528 80 V-
FLAG 288 -64 V+
FLAG 288 0 V-
FLAG 112 160 0
FLAG 400 -32 OUT
IOPIN 400 -32 Out
FLAG -64 160 0
FLAG 160 80 0
SYMBOL res -16 -48 R270
WINDOW 0 59 54 VTop 2
WINDOW 3 61 51 VBottom 2
SYMATTR InstName R1
SYMATTR Value {Ri*(1+e)}
SYMBOL res 240 -144 R270
WINDOW 0 59 56 VTop 2
WINDOW 3 60 60 VBottom 2
SYMATTR InstName R2
SYMATTR Value {Rf*(1-e)}
SYMBOL voltage 432 64 R0
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage 528 64 R0
SYMATTR InstName V3
SYMATTR Value -15
SYMBOL res -16 16 R270
WINDOW 0 -28 51 VTop 2
WINDOW 3 -29 49 VBottom 2
SYMATTR InstName R3
SYMATTR Value {Ri*(1-e)}
SYMBOL res 128 160 R180
WINDOW 0 50 44 Left 2
WINDOW 3 44 18 Left 2
SYMATTR InstName R4
SYMATTR Value {Rf*(1+e)}
SYMBOL cell -64 48 R0
WINDOW 0 -70 10 Left 2
WINDOW 3 -58 49 Left 2
SYMATTR InstName V1
SYMATTR Value 0
SYMBOL OpAmps\\ADA4000-1 288 -96 R0
SYMATTR InstName U1
SYMBOL e 240 -16 M270
WINDOW 0 -83 22 VRight 2
WINDOW 3 -106 -23 VRight 2
SYMATTR InstName E1
SYMATTR Value 0.0001
TEXT 128 224 Left 2 !.dc V1 0 1 10m
TEXT 128 256 Left 2 !.MEAS DC Vo1 FIND V(OUT) AT 0
TEXT 128 320 Left 2 !.MEAS DC CMR PARAM 20*log10((1*(Rf/Ri))/abs(Vo1-Vo2))
TEXT 128 288 Left 2 !.MEAS DC Vo2 FIND V(OUT) AT 1
TEXT -104 224 Left 2 !.param e=0.001
TEXT -104 256 Left 2 !.param Rf=10000
TEXT -104 288 Left 2 !.param Ri=1000