Version 4 SHEET 1 2784 1856 WIRE 336 176 336 144 WIRE 656 176 656 144 WIRE 1296 176 1296 144 WIRE 1616 176 1616 144 WIRE 2624 176 2624 144 WIRE 336 288 336 256 WIRE 384 288 336 288 WIRE 656 288 656 256 WIRE 656 288 608 288 WIRE 1296 288 1296 256 WIRE 1344 288 1296 288 WIRE 1616 288 1616 256 WIRE 1616 288 1568 288 WIRE 2624 288 2624 256 WIRE 2624 288 2576 288 WIRE 336 336 336 288 WIRE 656 336 656 288 WIRE 1296 336 1296 288 WIRE 1616 336 1616 288 WIRE 2304 336 2304 224 WIRE 2624 336 2624 288 WIRE 64 384 32 384 WIRE 112 384 64 384 WIRE 272 384 192 384 WIRE 800 384 720 384 WIRE 1024 384 992 384 WIRE 1072 384 1024 384 WIRE 1232 384 1152 384 WIRE 1760 384 1680 384 WIRE 2032 384 2000 384 WIRE 2080 384 2032 384 WIRE 2240 384 2160 384 WIRE 2768 384 2688 384 WIRE -272 416 -272 336 WIRE 32 432 32 384 WIRE 800 432 800 384 WIRE 992 432 992 384 WIRE 1760 432 1760 384 WIRE 2000 432 2000 384 WIRE 2768 432 2768 384 WIRE 336 480 336 432 WIRE 496 480 336 480 WIRE 656 480 656 432 WIRE 656 480 496 480 WIRE 1296 480 1296 432 WIRE 1328 480 1296 480 WIRE 1456 480 1408 480 WIRE 1504 480 1456 480 WIRE 1616 480 1616 432 WIRE 1616 480 1584 480 WIRE 2304 480 2304 432 WIRE 2464 480 2304 480 WIRE 2624 480 2624 432 WIRE 2624 480 2464 480 WIRE 32 560 32 512 WIRE 992 560 992 512 WIRE 2000 560 2000 512 WIRE 496 576 496 480 WIRE 1456 576 1456 480 WIRE 2464 576 2464 480 WIRE -272 592 -272 496 WIRE 496 720 496 656 WIRE 1456 720 1456 656 WIRE 2464 720 2464 656 FLAG -272 592 0 FLAG -272 336 VCC FLAG 1344 288 OUT2+ FLAG 1296 144 VCC FLAG 1616 144 VCC FLAG 1456 720 0 FLAG 1760 432 0 FLAG 992 560 0 FLAG 1024 384 S2 FLAG 1568 288 OUT2- FLAG 384 288 OUT1+ FLAG 336 144 VCC FLAG 656 144 VCC FLAG 496 720 0 FLAG 800 432 0 FLAG 32 560 0 FLAG 64 384 S1 FLAG 608 288 OUT1- FLAG 2304 224 VCC FLAG 2624 144 VCC FLAG 2464 720 0 FLAG 2768 432 0 FLAG 2000 560 0 FLAG 2032 384 S3 FLAG 2576 288 OUT3 SYMBOL voltage -272 400 R0 SYMATTR InstName Vps1 SYMATTR Value 10V SYMBOL npn 1232 336 R0 SYMATTR InstName Q3 SYMATTR Value 2N3904 SYMBOL npn 1680 336 M0 SYMATTR InstName Q4 SYMATTR Value 2N3904 SYMBOL res 1424 496 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName RE1 SYMATTR Value 100 SYMBOL res 1600 496 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName RE2 SYMATTR Value 100 SYMBOL res 1280 160 R0 SYMATTR InstName RC3 SYMATTR Value 10k SYMBOL res 1600 160 R0 SYMATTR InstName RC4 SYMATTR Value 10k SYMBOL current 1456 576 R0 SYMATTR InstName Ibias2 SYMATTR Value 1mA SYMBOL res 1168 400 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName RS2 SYMATTR Value 10k SYMBOL voltage 992 416 R0 WINDOW 123 24 118 Left 2 SYMATTR Value2 AC 1V 0 SYMATTR InstName Vs SYMATTR Value 0V SYMBOL npn 272 336 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL npn 720 336 M0 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res 320 160 R0 SYMATTR InstName RC1 SYMATTR Value 10k SYMBOL res 640 160 R0 SYMATTR InstName RC2 SYMATTR Value 10k SYMBOL current 496 576 R0 SYMATTR InstName Ibias1 SYMATTR Value 1mA SYMBOL res 208 400 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName RS1 SYMATTR Value 10k SYMBOL voltage 32 416 R0 WINDOW 123 24 118 Left 2 SYMATTR Value2 AC 1V 0 SYMATTR InstName Vs1 SYMATTR Value 0V SYMBOL npn 2240 336 R0 SYMATTR InstName Q5 SYMATTR Value 2N3904 SYMBOL npn 2688 336 M0 SYMATTR InstName Q6 SYMATTR Value 2N3904 SYMBOL res 2608 160 R0 SYMATTR InstName RC6 SYMATTR Value 10k SYMBOL current 2464 576 R0 SYMATTR InstName Ibias3 SYMATTR Value 1mA SYMBOL res 2176 400 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName RS3 SYMATTR Value 10k SYMBOL voltage 2000 416 R0 WINDOW 123 24 118 Left 2 SYMATTR Value2 AC 1V 0 SYMATTR InstName Vs2 SYMATTR Value 0V TEXT 1464 1000 Left 2 ;.OP TEXT 1392 864 Left 2 ;Spice Directive TEXT -328 648 Left 2 ;Power Supplies TEXT 1360 936 Left 2 !.AC DEC 10 1Hz 0.1GHz