Version 4
SHEET 1 1068 680
WIRE 144 -400 144 128
WIRE 304 32 304 128
WIRE 144 224 224 224
WIRE 224 256 224 224
WIRE 224 224 304 224
WIRE 80 176 -384 176
WIRE 224 384 224 352
WIRE -80 352 -80 304
WIRE -80 304 -48 304
WIRE 32 304 64 304
WIRE 64 352 64 304
WIRE 64 304 160 304
WIRE 96 464 64 464
WIRE 64 464 64 416
WIRE 176 464 224 464
WIRE 304 544 224 544
WIRE 224 544 224 464
WIRE 384 544 480 544
WIRE 480 544 480 352
WIRE 480 288 480 256
WIRE 480 192 480 -16
WIRE 480 576 480 544
WIRE 368 -16 480 -16
WIRE 480 -16 480 -48
WIRE -384 240 -384 176
WIRE -192 80 -192 112
WIRE -384 176 -384 80
WIRE -192 112 400 112
WIRE -192 112 -192 240
WIRE 400 112 400 176
WIRE 400 176 368 176
WIRE -384 320 -384 544
WIRE -192 320 -192 544
WIRE -256 32 -256 400
WIRE -624 128 -624 32
WIRE -624 32 -448 32
WIRE -624 208 -624 400
WIRE -528 -208 -528 -256
WIRE -528 -336 -528 -400
WIRE -528 -400 -384 -400
WIRE 656 -400 656 -256
WIRE 304 -320 304 -400
WIRE 304 -400 480 -400
WIRE -384 -16 -384 -400
WIRE -384 -400 -192 -400
WIRE -192 -16 -192 -400
WIRE -192 -400 144 -400
WIRE 304 -64 304 -208
WIRE 144 -400 304 -400
WIRE 480 -128 480 -400
WIRE 480 -400 656 -400
WIRE 656 -112 656 -160
WIRE 656 16 656 -32
WIRE 592 -208 304 -208
WIRE 304 -208 304 -240
WIRE 224 544 -192 544
WIRE -192 544 -384 544
FLAG 480 576 0
FLAG -80 352 0
FLAG 656 16 0
FLAG -528 -208 0
FLAG -624 400 0
FLAG -256 400 0
SYMBOL npn 80 128 R0
SYMATTR InstName Q1
SYMATTR Value 2N5179
SYMBOL npn 368 128 M0
SYMATTR InstName Q3
SYMATTR Value 2N5179
SYMBOL npn 160 256 R0
SYMATTR InstName Q2
SYMATTR Value 2N5179
SYMBOL res 208 368 R0
SYMATTR InstName R4
SYMATTR Value 180
SYMBOL res 48 288 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 470
SYMBOL voltage -624 112 R0
WINDOW 123 24 132 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC AC 1.
SYMATTR InstName V1
SYMATTR Value SINE(0 .05 1e6)
SYMBOL voltage 400 544 R90
WINDOW 123 32 56 VTop 0
WINDOW 39 32 56 VTop 0
WINDOW 0 -32 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage -528 -352 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 5
SYMBOL diode 48 352 R0
SYMATTR InstName D1
SYMBOL res 192 448 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 360
SYMBOL npn 368 -64 M0
SYMATTR InstName Q4
SYMATTR Value 2N5179
SYMBOL npn -448 -16 R0
SYMATTR InstName Q5
SYMATTR Value 2N5179
SYMBOL npn -256 -16 R0
SYMATTR InstName Q6
SYMATTR Value 2N5179
SYMBOL npn 592 -256 R0
SYMATTR InstName Q7
SYMATTR Value 2N5179
SYMBOL res 464 -144 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -208 224 R0
SYMATTR InstName R2
SYMATTR Value 4.3k
SYMBOL res -400 224 R0
SYMATTR InstName R5
SYMATTR Value 4.3k
SYMBOL diode 464 192 R0
SYMATTR InstName D2
SYMBOL diode 464 288 R0
SYMATTR InstName D3
SYMBOL res 288 -336 R0
SYMATTR InstName R7
SYMATTR Value 300
SYMBOL res 640 -128 R0
SYMATTR InstName R8
SYMATTR Value 270
TEXT -162 506 Left 0 !;tran 4e-6
TEXT -200 560 Left 0 !.ac dec 100 100e3 100e7
TEXT -658 610 Left 0 !;op