Version 4
SHEET 1 880 680
WIRE 384 48 224 48
WIRE 288 160 288 128
WIRE 224 176 224 48
WIRE 256 176 224 176
WIRE 384 192 384 48
WIRE 384 192 320 192
WIRE 448 192 384 192
WIRE 112 208 0 208
WIRE 256 208 192 208
WIRE 448 224 448 192
WIRE 0 272 0 208
WIRE 288 256 288 224
WIRE -320 272 -320 240
WIRE -192 272 -192 240
WIRE -320 384 -320 352
WIRE -192 384 -192 352
WIRE 0 384 0 352
WIRE 448 384 448 304
FLAG -320 384 0
FLAG -192 384 0
FLAG -320 240 +UB
FLAG -192 240 -UB
FLAG 288 128 +UB
FLAG 288 256 -UB
FLAG 0 384 0
FLAG 0 208 IN
FLAG 448 192 OUT
FLAG 448 384 0
SYMBOL Opamps\\opamp2 288 128 R0
SYMATTR InstName U1
SYMATTR Value OPA134
SYMBOL voltage -320 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 4.5
SYMBOL voltage -192 368 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 4.5
SYMBOL voltage 0 368 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 24 -12 Left 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 1 1)
SYMATTR Value2 AC 1
SYMBOL res 432 208 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 208 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 20
TEXT -320 440 Left 2 !.include OPA134.LIB
TEXT -320 464 Left 2 !.tran 1
TEXT -320 512 Left 2 !.noise V[OUT] V3 dec 20 20 20k