Version 4 SHEET 1 1476 988 WIRE 128 -96 -96 -96 WIRE 448 -96 128 -96 WIRE 608 -96 448 -96 WIRE 704 -96 608 -96 WIRE 800 -96 704 -96 WIRE 1056 -96 800 -96 WIRE 1152 -96 1056 -96 WIRE 448 -64 448 -96 WIRE 608 -64 608 -96 WIRE 128 48 128 -96 WIRE 448 48 448 16 WIRE 608 48 608 16 WIRE 704 48 704 -96 WIRE -80 96 -96 96 WIRE 0 96 -80 96 WIRE 64 96 0 96 WIRE 528 96 512 96 WIRE 544 96 528 96 WIRE 368 112 272 112 WIRE 272 144 272 112 WIRE 448 176 448 144 WIRE 528 176 528 96 WIRE 528 176 448 176 WIRE 0 208 0 96 WIRE 224 208 0 208 WIRE 368 208 368 112 WIRE 368 208 320 208 WIRE 608 208 608 144 WIRE 608 208 368 208 WIRE 800 208 800 -96 WIRE 448 240 448 176 WIRE 608 256 608 208 WIRE 704 256 704 112 WIRE 704 256 608 256 WIRE 736 256 704 256 WIRE 1056 256 1056 -96 WIRE 1152 272 1152 -96 WIRE 128 288 128 144 WIRE 384 288 128 288 WIRE 848 304 800 304 WIRE 960 304 928 304 WIRE 992 304 960 304 WIRE 128 336 128 288 WIRE 960 336 960 304 WIRE 448 352 448 336 WIRE 960 432 960 416 WIRE 1056 432 1056 352 WIRE 1056 432 960 432 WIRE 128 448 128 416 WIRE 128 448 32 448 WIRE 224 448 128 448 WIRE 448 448 448 432 WIRE 448 448 336 448 WIRE -80 464 -80 96 WIRE 32 464 32 448 WIRE 224 464 224 448 WIRE 336 480 336 448 WIRE 704 512 704 256 WIRE 448 528 448 448 WIRE 32 576 32 544 WIRE 112 576 32 576 WIRE 224 576 224 544 WIRE 336 576 336 544 WIRE 336 576 224 576 WIRE 384 576 336 576 WIRE 32 608 32 576 WIRE 224 608 224 576 WIRE -416 656 -432 656 WIRE 112 656 112 576 WIRE 112 656 96 656 WIRE 144 656 112 656 WIRE 160 656 144 656 WIRE 608 688 608 256 WIRE -432 704 -432 656 WIRE 144 736 144 656 WIRE 320 736 144 736 WIRE 544 736 400 736 WIRE 224 752 224 704 WIRE -432 816 -432 784 WIRE -432 832 -432 816 WIRE -80 864 -80 528 WIRE -80 864 -96 864 WIRE 32 864 32 704 WIRE 32 864 -80 864 WIRE 224 864 224 832 WIRE 224 864 32 864 WIRE 448 864 448 624 WIRE 448 864 224 864 WIRE 608 864 608 784 WIRE 608 864 448 864 WIRE 704 864 704 576 WIRE 704 864 608 864 WIRE 1056 864 1056 432 WIRE 1056 864 704 864 WIRE 1152 864 1152 336 WIRE 1152 864 1056 864 FLAG -96 -96 CATHODE FLAG -96 96 REF FLAG -96 864 ANODE FLAG -272 80 ANODE FLAG -272 144 0 FLAG -432 912 0 FLAG -432 656 CATHODE FLAG -384 80 REF FLAG -384 144 CATHODE FLAG -288 736 0 FLAG -288 656 t FLAG -432 816 VCC SYMBOL npn 64 48 R0 SYMATTR InstName Q1 SYMBOL npn 320 144 R90 SYMATTR InstName Q2 SYMBOL npn 96 608 M0 SYMATTR InstName Q3 SYMBOL npn 160 608 R0 SYMATTR InstName Q4 SYMBOL npn 384 240 R0 SYMATTR InstName Q5 SYMBOL npn 384 528 R0 SYMATTR InstName Q6 SYMBOL npn 544 688 R0 SYMATTR InstName Q7 SYMBOL npn 736 208 R0 SYMATTR InstName Q8 SYMBOL pnp 512 144 R180 SYMATTR InstName Q10 SYMBOL pnp 544 144 M180 SYMATTR InstName Q11 SYMBOL res 112 320 R0 SYMATTR InstName R1 SYMATTR Value 3.28k SYMBOL res 16 448 R0 SYMATTR InstName R2 SYMATTR Value 2.4k SYMBOL res 208 448 R0 SYMATTR InstName R3 SYMATTR Value 7.2k SYMBOL res 208 736 R0 SYMATTR InstName R4 SYMATTR Value 800 SYMBOL res 432 -80 R0 SYMATTR InstName R5 SYMATTR Value 800 SYMBOL res 592 -80 R0 SYMATTR InstName R6 SYMATTR Value 800 SYMBOL res 432 336 R0 SYMATTR InstName R7 SYMATTR Value 4k SYMBOL cap 320 480 R0 SYMATTR InstName C1 SYMATTR Value 20p SYMBOL res 416 720 R90 WINDOW 0 5 56 VBottom 0 WINDOW 3 27 56 VTop 0 SYMATTR InstName R8 SYMATTR Value 1k SYMBOL cap 688 48 R0 SYMATTR InstName C2 SYMATTR Value 20p SYMBOL res 944 288 R90 WINDOW 0 5 56 VBottom 0 WINDOW 3 27 56 VTop 0 SYMATTR InstName R9 SYMATTR Value 150 SYMBOL res 944 320 R0 SYMATTR InstName R10 SYMATTR Value 10k SYMBOL Misc\\jumper -336 112 R270 SYMATTR InstName X2 SYMBOL voltage -432 816 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value PULSE(0V 5V 0 {C*R/1k}) SYMBOL res -416 800 R180 WINDOW 0 36 76 Left 0 WINDOW 3 36 40 Left 0 SYMATTR InstName R11 SYMATTR Value {R} SYMBOL cap -96 464 R0 SYMATTR InstName C3 SYMATTR Value {C} SYMBOL Misc\\jumper -448 112 R270 SYMATTR InstName X1 SYMBOL voltage -288 640 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value {R*C} SYMBOL npn 992 256 R0 SYMATTR InstName Q9 SYMBOL diode 720 576 R180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D1 SYMBOL diode 1168 336 R180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D2 TEXT -480 336 Left 0 !.tran 0 {4*R*C} 0 TEXT -480 504 Left 0 ;.step oct param C 0.001u 10u 6 TEXT -480 432 Left 0 ;.step dec param R 100 1k 6 TEXT -480 408 Left 0 !.param R 1k TEXT -480 480 Left 0 !.param C 0.1u TEXT -480 568 Left 0 ;.meas tran amplitude PP V(ref)