Version 4.1
SHEET 1 2100 680
WIRE 32 80 -320 80
WIRE 128 80 32 80
WIRE 336 80 128 80
WIRE 336 112 336 80
WIRE -320 144 -320 80
WIRE 128 176 128 80
WIRE 336 224 336 192
WIRE 400 224 336 224
WIRE 480 224 400 224
WIRE 768 224 544 224
WIRE 784 224 768 224
WIRE 336 240 336 224
WIRE -144 288 -192 288
WIRE -64 288 -144 288
WIRE 128 288 128 256
WIRE 128 288 0 288
WIRE 176 288 128 288
WIRE 272 288 176 288
WIRE 336 352 336 336
WIRE 528 352 336 352
WIRE 768 352 768 224
WIRE 336 368 336 352
WIRE 384 368 336 368
WIRE 128 384 128 288
WIRE -192 400 -192 288
WIRE 336 432 336 368
WIRE 528 448 528 432
WIRE -320 560 -320 224
WIRE -192 560 -192 480
WIRE -192 560 -320 560
WIRE 128 560 128 464
WIRE 128 560 -192 560
WIRE 256 560 128 560
WIRE 336 560 336 512
WIRE 336 560 256 560
WIRE 528 560 528 512
WIRE 528 560 336 560
WIRE 768 560 768 432
WIRE 768 560 528 560
WIRE 848 560 768 560
WIRE 256 608 256 560
FLAG 784 224 out
FLAG -144 288 input
FLAG 32 80 Vsupply
FLAG 256 608 0
FLAG 176 288 base
FLAG 400 224 collector
FLAG 384 368 emmitter
SYMBOL res 112 160 R0
SYMATTR InstName R1
SYMATTR Value 1.84k
SYMBOL npn 272 240 R0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL res 112 368 R0
SYMATTR InstName R2
SYMATTR Value 300R
SYMBOL cap 0 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 544 208 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL res 320 96 R0
SYMATTR InstName R_collector
SYMATTR Value 1.34k
SYMBOL res 320 416 R0
SYMATTR InstName R_emmitter_1
SYMATTR Value 300R
SYMBOL voltage -320 128 R0
SYMATTR InstName V1_supply
SYMATTR Value 15V
SYMBOL voltage -192 384 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 0.01 100k)
SYMBOL res 752 336 R0
SYMATTR InstName R3
SYMATTR Value 1Meg
SYMBOL cap 512 448 R0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL res 512 336 R0
SYMATTR InstName R_emmitter_2
SYMATTR Value 30R
TEXT -216 -296 Left 4 ;common emmitter-3
TEXT -288 624 Left 2 !.tran 0.1m
TEXT -216 -248 Left 4 ;instructions
TEXT -208 -216 Left 2 ;click on run\nthen click on "input" to plot it.\nthen click on the plot window then on plot settings / add plot pane\nthen click on "base" to plot it\nthen click on the plot window and plot settings/add plot pane\nthen click on "collector" to plot it\nthen click on the plot window and plot settings/add plot pane\nthen click on "output" to plot it\nthe gain of this cct is R_collector/R_emmitter_2 \n= 1.34k/30R = about 35.
TEXT 680 472 Left 2 ;R3 is to give the node "out"\na Dc path to ground.\nSpice requires this.