Version 4
SHEET 1 1024 740
WIRE -16 16 -96 16
WIRE 96 16 -16 16
WIRE 368 16 288 16
WIRE 464 16 368 16
WIRE 96 32 96 16
WIRE 96 128 96 112
WIRE 192 128 96 128
WIRE 464 128 464 16
WIRE -96 144 -96 16
WIRE 96 160 96 128
WIRE 288 160 288 16
WIRE 192 208 192 128
WIRE 192 208 160 208
WIRE 224 208 192 208
WIRE -96 288 -96 224
WIRE 96 288 96 256
WIRE 288 288 288 256
WIRE 288 288 96 288
WIRE 464 288 464 208
WIRE 96 304 96 288
WIRE 576 416 432 416
WIRE 432 448 432 416
WIRE 240 464 240 416
WIRE 208 480 160 480
WIRE 288 496 272 496
WIRE -32 512 -96 512
WIRE 112 512 48 512
WIRE 208 512 112 512
WIRE 576 544 576 416
WIRE -96 560 -96 512
WIRE 160 560 160 480
WIRE 432 560 432 544
WIRE 432 560 160 560
WIRE 112 576 112 512
WIRE 432 576 432 560
WIRE -96 688 -96 640
WIRE 112 688 112 656
WIRE 112 688 -96 688
WIRE 240 688 240 528
WIRE 240 688 112 688
WIRE 432 688 432 656
WIRE 432 688 240 688
WIRE 576 704 576 624
WIRE -96 720 -96 688
FLAG 96 304 0
FLAG -96 288 0
FLAG 464 288 0
FLAG -96 720 0
FLAG 576 704 0
FLAG 368 16 out
FLAG -16 16 5V
FLAG 240 416 5V
SYMBOL npn 160 160 M0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL npn 224 160 R0
SYMATTR InstName Q2
SYMATTR Value BC547B
SYMBOL res 80 16 R0
SYMATTR InstName R1
SYMATTR Value 820
SYMBOL voltage -96 128 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 464 112 R0
SYMATTR InstName V2
SYMATTR Value 0
SYMBOL npn 368 448 R0
SYMATTR InstName Q3
SYMATTR Value BC547B
SYMBOL res 416 560 R0
SYMATTR InstName R2
SYMATTR Value 4.7
SYMBOL res 96 560 R0
SYMATTR InstName R3
SYMATTR Value 220
SYMBOL res 272 512 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 2.2k
SYMBOL res -48 528 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL voltage -96 544 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 1.25
SYMBOL bv 576 528 R0
SYMATTR InstName B1
SYMATTR Value V=V(out)
SYMBOL Opamps\\UniversalOpamp2 240 496 R0
SYMATTR InstName U2
TEXT -88 -104 Left 2 !.dc V2 0 .5 0.001
TEXT 48 -16 Left 2 ;Example: BCV61
TEXT 16 432 Left 2 ;low offset opamp
TEXT 72 -168 Left 4 ;Current Sources