Version 4
SHEET 1 880 680
WIRE 608 -272 448 -272
WIRE 448 -240 448 -272
WIRE 608 -240 608 -272
WIRE 608 -144 608 -160
WIRE 48 -112 -80 -112
WIRE 128 -112 48 -112
WIRE 272 -112 208 -112
WIRE 448 -112 448 -160
WIRE 448 -112 272 -112
WIRE -80 -80 -80 -112
WIRE 448 -80 448 -112
WIRE 48 -48 48 -112
WIRE 272 -48 272 -112
WIRE 272 96 272 32
WIRE 416 96 272 96
WIRE 544 96 480 96
WIRE 560 96 544 96
WIRE 272 128 272 96
WIRE 544 160 544 96
WIRE -352 176 -352 144
WIRE -112 176 -352 176
WIRE 48 176 48 32
WIRE 48 176 -48 176
WIRE 208 176 48 176
WIRE -352 208 -352 176
WIRE 48 256 48 176
WIRE 272 256 272 224
WIRE 544 272 544 240
WIRE -352 320 -352 288
FLAG 48 336 0
FLAG 272 336 0
FLAG -80 -16 0
FLAG 448 -16 0
FLAG 608 -144 0
FLAG -352 320 0
FLAG -352 144 INPUT
FLAG 560 96 OUTPUT
FLAG 544 272 0
SYMBOL npn2 208 128 R0
SYMATTR InstName Q1
SYMATTR Value BC414B
SYMBOL res 256 240 R0
SYMATTR InstName R1
SYMATTR Value 820
SYMBOL res 32 240 R0
SYMATTR InstName R2
SYMATTR Value 82k
SYMBOL res 32 -64 R0
SYMATTR InstName R3
SYMATTR Value 1000k
SYMBOL res 256 -64 R0
SYMATTR InstName R4
SYMATTR Value 12k
SYMBOL cap -48 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL cap 480 80 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 4µ7
SYMBOL cap 432 -16 M180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C3
SYMATTR Value 100µ
SYMBOL cap -96 -16 M180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C4
SYMATTR Value 2µ2
SYMBOL res 464 -256 M0
SYMATTR InstName R5
SYMATTR Value 1k8
SYMBOL res 112 -96 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 56k
SYMBOL voltage 608 -256 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 24V
SYMBOL voltage -352 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(500mV 500mV 10k 50µ)
SYMBOL res 528 144 R0
SYMATTR InstName RLoad
SYMATTR Value 56k
TEXT -258 360 Left 2 !.tran 250µS