Version 4
SHEET 1 880 680
WIRE 176 -16 96 -16
WIRE 224 -16 176 -16
WIRE 224 0 224 -16
WIRE 96 16 96 -16
WIRE 224 96 224 80
WIRE 384 96 224 96
WIRE 0 144 -48 144
WIRE 96 144 96 96
WIRE 96 144 64 144
WIRE 160 144 96 144
WIRE -736 176 -736 160
WIRE -608 176 -608 160
WIRE -608 176 -736 176
WIRE -736 192 -736 176
WIRE 224 208 224 192
WIRE 384 208 224 208
WIRE 96 224 96 144
WIRE 224 224 224 208
WIRE 96 352 96 304
WIRE 224 352 224 304
WIRE 224 352 96 352
WIRE 224 368 224 352
FLAG -736 192 0
FLAG -736 80 +10V
FLAG 176 -16 +10V
FLAG -608 80 Vin
FLAG -48 144 Vin
FLAG 224 368 0
FLAG 384 208 Ve
FLAG 384 96 Vc
SYMBOL npn 160 96 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 68 Invisible 0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL res 208 208 R0
WINDOW 0 36 40 Invisible 0
WINDOW 3 80 75 Left 0
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL voltage -736 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -28 61 Left 0
SYMATTR InstName V1
SYMATTR Value +10V
SYMBOL voltage -608 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 56 -87 VRight 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 2.5V 1kHz)
SYMBOL cap 64 128 R90
WINDOW 0 0 32 Invisible 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 1µF
SYMBOL res 80 0 R0
WINDOW 0 36 40 Invisible 0
SYMATTR InstName R4
SYMATTR Value 68K
SYMBOL res 80 208 R0
WINDOW 0 36 40 Invisible 0
SYMATTR InstName R3
SYMATTR Value 33K
SYMBOL res 208 -16 R0
SYMATTR InstName Rc
SYMATTR Value 1K
TEXT -704 264 Left 0 !.tran 1.3ms
TEXT 240 280 Left 0 ;R
TEXT 256 296 Left 0 ;E
TEXT 264 280 Left 0 ;=