Version 4
SHEET 1 880 680
WIRE 304 -16 -208 -16
WIRE 96 32 48 32
WIRE 304 96 304 -16
WIRE 384 96 304 96
WIRE -144 112 -160 112
WIRE -48 112 -64 112
WIRE 48 112 48 32
WIRE 48 112 32 112
WIRE 80 112 48 112
WIRE 528 112 448 112
WIRE -320 128 -320 112
WIRE 176 128 176 32
WIRE 176 128 144 128
WIRE 208 128 176 128
WIRE 352 128 288 128
WIRE 384 128 352 128
WIRE -160 144 -160 112
WIRE 80 144 48 144
WIRE 352 224 352 128
WIRE 384 224 352 224
WIRE 528 224 528 112
WIRE 528 224 464 224
WIRE -208 256 -208 -16
WIRE -48 256 -208 256
WIRE 48 256 48 144
WIRE 48 256 32 256
WIRE 96 256 48 256
WIRE 176 256 176 128
WIRE 48 288 48 256
WIRE 192 288 48 288
WIRE 48 304 48 288
WIRE 528 368 528 224
WIRE 528 368 240 368
WIRE -208 384 -208 336
WIRE 48 384 48 352
WIRE 48 384 -208 384
WIRE 192 384 48 384
WIRE 48 400 48 384
FLAG -320 128 0
FLAG -320 32 Vcc
FLAG 112 96 Vcc
FLAG 112 160 0
FLAG -160 144 0
FLAG 48 400 0
FLAG 416 144 0
FLAG 416 80 Vcc
SYMBOL Opamps\\AD820 112 64 R0
SYMATTR InstName U1
SYMBOL res 48 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 620
SYMBOL res 192 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 1.2k
SYMBOL res 192 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 3.3k
SYMBOL res 48 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 3.3k
SYMBOL cap 32 288 R0
SYMATTR InstName C1
SYMATTR Value 0.015µ
SYMATTR SpiceLine V=50 Irms=0 Rser=0 Lser=0 mfg="Murata" pn="GCM155R71H153KA55" type="X7R"
SYMBOL voltage -320 16 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL Opamps\\AD820 416 48 R0
SYMATTR InstName U2
SYMBOL voltage -208 240 R0
SYMATTR InstName V2
SYMATTR Value 2.5
SYMBOL res 304 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res 480 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 12k
SYMBOL nmos 240 288 M0
SYMATTR InstName M1
SYMATTR Value 2N7002
SYMBOL res -48 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 43
TEXT -272 424 Left 2 !.tran 100m startup