Version 4
SHEET 1 880 680
WIRE -320 -192 -656 -192
WIRE -32 -192 -320 -192
WIRE 288 -192 -32 -192
WIRE -320 -80 -320 -192
WIRE 288 96 288 -192
WIRE -656 112 -656 -192
WIRE -32 112 -32 -192
WIRE -64 128 -128 128
WIRE 224 144 0 144
WIRE -320 160 -320 0
WIRE -240 160 -320 160
WIRE -64 160 -240 160
WIRE -128 256 -128 128
WIRE 208 256 -128 256
WIRE 288 256 288 192
WIRE 288 256 208 256
WIRE -320 288 -320 160
WIRE 288 352 288 256
WIRE -656 512 -656 192
WIRE -320 512 -320 352
WIRE -320 512 -656 512
WIRE -32 512 -32 176
WIRE -32 512 -320 512
WIRE 288 512 288 432
WIRE 288 512 -32 512
WIRE -656 592 -656 512
FLAG -656 592 0
FLAG -240 160 in
FLAG 208 256 out
SYMBOL voltage -656 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR Value2 ""
SYMATTR SpiceLine Rser=1
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL res -336 -96 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMATTR SpiceLine ""
SYMBOL Opamps\\LT1001 -32 80 R0
SYMATTR InstName U1
SYMBOL zener -304 352 R180
WINDOW 0 -41 60 Left 2
WINDOW 3 -127 -4 Left 2
SYMATTR InstName D1
SYMATTR Value BZX84C10L
SYMBOL npn 224 96 R0
SYMATTR InstName Q1
SYMATTR Value 2N3055
SYMBOL res 272 336 R0
SYMATTR InstName R2
SYMATTR Value 100
SYMATTR SpiceLine ""
TEXT -624 456 Left 2 !.dc V1 10 15 0.01