Version 4
SHEET 1 1176 680
WIRE -752 -240 -752 -256
WIRE -752 -240 -816 -240
WIRE -816 -224 -816 -240
WIRE -752 -224 -752 -240
WIRE 304 -208 304 -384
WIRE 304 -208 272 -208
WIRE 336 -208 304 -208
WIRE 144 -112 -336 -112
WIRE 272 -64 272 -112
WIRE 272 -64 208 -64
WIRE 336 -64 336 -112
WIRE 400 -64 336 -64
WIRE -336 -48 -336 -112
WIRE -336 48 -336 16
WIRE 208 96 208 -64
WIRE 304 96 208 96
WIRE 400 96 400 -64
WIRE 304 144 304 96
WIRE 304 144 272 144
WIRE 336 144 304 144
WIRE -336 160 -336 128
WIRE 208 224 208 192
WIRE 400 224 400 192
WIRE 400 224 208 224
WIRE 560 224 400 224
FLAG -336 160 0
FLAG -816 -224 0
FLAG -752 -336 V+
FLAG -752 -144 V-
SYMBOL npn 336 96 R0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL pnp 144 -64 M180
WINDOW 0 35 43 Left 2
WINDOW 3 -101 77 Left 2
SYMATTR InstName Q2
SYMATTR Value 2N2907
SYMBOL Opamps\\LT1056 1072 -80 R0
SYMATTR InstName U1
SYMBOL diode 752 0 R0
SYMATTR InstName D1
SYMBOL pnp 208 -112 M180
WINDOW 0 41 53 Left 2
WINDOW 3 -112 72 Left 2
SYMATTR InstName Q3
SYMATTR Value 2N2907
SYMBOL pnp 464 -64 R180
WINDOW 0 35 43 Left 2
WINDOW 3 -101 77 Left 2
SYMATTR InstName Q4
SYMATTR Value 2N2907
SYMBOL pnp 400 -112 R180
WINDOW 0 41 53 Left 2
WINDOW 3 -112 72 Left 2
SYMATTR InstName Q5
SYMATTR Value 2N2907
SYMBOL res -352 32 R0
SYMATTR InstName R1
SYMATTR Value 500
SYMBOL cap -352 -48 R0
SYMATTR InstName C1
SYMATTR Value 500p
SYMBOL npn 272 96 M0
SYMATTR InstName Q6
SYMATTR Value 2N2222
SYMBOL voltage -752 -352 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -752 -240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 15