Version 4
SHEET 1 960 680
WIRE -192 -80 -320 -80
WIRE -48 -80 -192 -80
WIRE 112 -80 -48 -80
WIRE 224 -80 112 -80
WIRE 416 -80 320 -80
WIRE -192 -32 -192 -80
WIRE -48 -32 -48 -80
WIRE 240 0 240 -32
WIRE 256 0 240 0
WIRE 256 32 256 0
WIRE 112 112 112 -80
WIRE -320 128 -320 -80
WIRE -192 128 -192 48
WIRE 80 128 -192 128
WIRE 416 128 416 -80
WIRE 256 144 256 112
WIRE 256 144 144 144
WIRE -48 160 -48 48
WIRE 80 160 -48 160
WIRE 256 176 256 144
WIRE -48 192 -48 160
WIRE -192 256 -192 128
WIRE -48 288 -48 256
WIRE 256 288 256 256
WIRE 256 288 -48 288
WIRE -48 304 -48 288
WIRE -320 400 -320 208
WIRE -192 400 -192 336
WIRE -192 400 -320 400
WIRE -48 400 -48 384
WIRE -48 400 -192 400
WIRE 112 400 112 176
WIRE 112 400 -48 400
WIRE -320 432 -320 400
WIRE 416 448 416 208
FLAG -320 432 0
FLAG 416 448 0
FLAG 416 -80 out
SYMBOL res -208 -48 R0
SYMATTR InstName R1
SYMATTR Value 953k
SYMATTR SpiceLine tol=0.5
SYMBOL res -208 240 R0
SYMATTR InstName R2
SYMATTR Value 1meg
SYMATTR SpiceLine tol=0.1
SYMBOL res -64 -48 R0
SYMATTR InstName R3
SYMATTR Value 200k
SYMATTR SpiceLine tol=0.5
SYMBOL res -64 288 R0
SYMATTR InstName R4
SYMATTR Value 50k
SYMATTR SpiceLine tol=1
SYMBOL res 240 160 R0
SYMATTR InstName R5
SYMATTR Value 1meg
SYMATTR SpiceLine tol=0.5
SYMBOL res 240 16 R0
SYMATTR InstName R6
SYMATTR Value 1meg
SYMATTR SpiceLine tol=0.1
SYMBOL pmos 320 -32 M270
SYMATTR InstName M1
SYMATTR Value Si7465DP
SYMBOL voltage -320 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 20
SYMBOL Opamps\\LT1495 112 80 R0
SYMATTR InstName U3
SYMBOL res 400 112 R0
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL References\\LT1634-5 -48 224 R0
SYMATTR InstName U1
TEXT -336 504 Left 2 !.dc V1 20 0 0.001