Version 4 SHEET 1 1524 1496 WIRE 400 -16 400 -48 WIRE 736 32 736 0 WIRE 544 96 544 32 WIRE -160 144 -160 64 WIRE 112 144 80 144 WIRE 160 144 112 144 WIRE 256 144 240 144 WIRE 352 144 320 144 WIRE 400 144 400 64 WIRE 400 144 352 144 WIRE 480 144 400 144 WIRE 736 144 736 112 WIRE 848 144 736 144 WIRE 992 144 912 144 WIRE 1072 144 992 144 WIRE 1088 144 1072 144 WIRE 736 160 736 144 WIRE 80 192 80 144 WIRE 400 192 400 144 WIRE 992 192 992 144 WIRE 544 208 544 192 WIRE 544 208 496 208 WIRE 672 208 544 208 WIRE 544 224 544 208 WIRE 736 304 736 256 WIRE 736 304 688 304 WIRE 880 304 736 304 WIRE -160 320 -160 224 WIRE 80 320 80 272 WIRE 400 320 400 272 WIRE 736 320 736 304 WIRE 992 320 992 272 WIRE 880 336 880 304 WIRE 544 352 544 304 WIRE 736 448 736 400 WIRE 880 448 880 400 FLAG -160 320 0 FLAG -160 64 VCC FLAG 736 0 VCC FLAG 496 208 E1 FLAG 992 320 0 FLAG 1072 144 OUT FLAG 400 320 0 FLAG 80 320 0 FLAG 112 144 S1 FLAG 352 144 IN FLAG 544 352 0 FLAG 400 -48 VCC FLAG 688 304 E2 FLAG 736 448 0 FLAG 544 32 VCC FLAG 880 448 0 SYMBOL voltage -160 128 R0 SYMATTR InstName Vps1 SYMATTR Value 20V SYMBOL res 720 16 R0 SYMATTR InstName RC SYMATTR Value 4k SYMBOL npn 480 96 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res 528 208 R0 SYMATTR InstName RE1 SYMATTR Value 4.3k SYMBOL cap 912 128 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName Cc2 SYMATTR Value 1µF SYMBOL res 976 176 R0 SYMATTR InstName RL1 SYMATTR Value 4k SYMBOL res 384 176 R0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL cap 320 128 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName Cc1 SYMATTR Value 1µF SYMBOL res 256 160 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName Rs SYMATTR Value 4k SYMBOL voltage 80 176 R0 WINDOW 123 24 118 Left 2 SYMATTR Value2 AC 1V 0 SYMATTR InstName Vs1 SYMATTR Value 0V SYMBOL res 384 -32 R0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL npn 672 160 R0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res 720 304 R0 SYMATTR InstName RE2 SYMATTR Value 3.6k SYMBOL cap 864 336 R0 SYMATTR InstName CE SYMATTR Value 47µF TEXT 520 560 Left 2 !.OP TEXT 448 464 Left 2 ;Spice Directive TEXT -208 472 Left 2 ;Power Supplies TEXT 392 512 Left 2 ;.AC DEC 10 1Hz 1GHz