Commit: ae9bb2ae88c4508d4ae9b5988489204accf57b92 - moto_test_circuit (git)

test repo for electronic handcraft works.

Commit MetaInfo

• Revision: ae9bb2ae88c4508d4ae9b5988489204accf57b92 (tree)
• Time: 2022-09-20 22:17:13
• Author: astoria-d <astoria-d@home>
• Commiter: astoria-d

Log Message

bias circuit test

Change Summary

• add: ltspice/transistor-fixed-bias-01.asc
• add: ltspice/transistor-self-bias-01.asc
• add: work1.txt

Incremental Difference

--- /dev/null
+++ b/ltspice/transistor-fixed-bias-01.asc
@@ -0,0 +1,68 @@
+Version 4
+SHEET 1 1040 680
+WIRE 208 -128 32 -128
+WIRE 560 -128 208 -128
+WIRE 208 -80 208 -128
+WIRE 32 16 32 -128
+WIRE 208 64 208 0
+WIRE 304 64 208 64
+WIRE 800 64 368 64
+WIRE 944 64 800 64
+WIRE 208 112 208 64
+WIRE -144 160 -528 160
+WIRE 32 160 32 96
+WIRE 32 160 -80 160
+WIRE 144 160 32 160
+WIRE 800 208 800 64
+WIRE 560 224 560 -128
+WIRE -528 240 -528 160
+WIRE -528 432 -528 320
+WIRE -64 432 -528 432
+WIRE 208 432 208 208
+WIRE 208 432 -64 432
+WIRE 560 432 560 304
+WIRE 560 432 208 432
+WIRE 800 432 800 288
+WIRE 800 432 560 432
+WIRE -64 464 -64 432
+FLAG -64 464 0
+FLAG 944 64 out
+IOPIN 944 64 Out
+SYMBOL current -240 320 R180
+WINDOW 0 24 80 Left 2
+WINDOW 3 -225 0 Left 2
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName I1
+SYMATTR Value SINE(0 25u 1kHz)
+SYMBOL voltage 560 208 R0
+SYMATTR InstName V1
+SYMATTR Value 3.3v
+SYMBOL npn 144 112 R0
+SYMATTR InstName Q1
+SYMATTR Value 2N3904
+SYMBOL res 192 -96 R0
+SYMATTR InstName R1
+SYMATTR Value 680
+SYMBOL res 16 0 R0
+SYMATTR InstName R2
+SYMATTR Value 105k
+SYMBOL cap -80 144 R90
+WINDOW 0 0 32 VBottom 2
+WINDOW 3 32 32 VTop 2
+SYMATTR InstName C1
+SYMATTR Value 10ｵ
+SYMBOL cap 368 48 R90
+WINDOW 0 0 32 VBottom 2
+WINDOW 3 32 32 VTop 2
+SYMATTR InstName C2
+SYMATTR Value 10ｵ
+SYMBOL res 784 192 R0
+SYMATTR InstName R3
+SYMATTR Value 20k
+SYMBOL voltage -528 224 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V2
+SYMATTR Value SINE(0 25u 1khz)
+TEXT -400 -8 Left 2 !.tran 3m

--- /dev/null
+++ b/ltspice/transistor-self-bias-01.asc
@@ -0,0 +1,70 @@
+Version 4
+SHEET 1 1232 680
+WIRE 800 -256 368 -256
+WIRE 368 -160 368 -256
+WIRE 368 -32 368 -80
+WIRE 368 -32 160 -32
+WIRE 160 64 160 -32
+WIRE 368 96 368 -32
+WIRE 512 96 368 96
+WIRE 576 96 560 96
+WIRE 1040 96 576 96
+WIRE 1136 96 1040 96
+WIRE 368 176 368 96
+WIRE 800 192 800 -256
+WIRE 1040 208 1040 96
+WIRE 16 224 -576 224
+WIRE 160 224 160 144
+WIRE 160 224 80 224
+WIRE 304 224 160 224
+WIRE -576 272 -576 224
+WIRE -576 416 -576 352
+WIRE 176 416 -576 416
+WIRE 368 416 368 272
+WIRE 368 416 176 416
+WIRE 800 416 800 272
+WIRE 800 416 368 416
+WIRE 1040 416 1040 288
+WIRE 1040 416 800 416
+WIRE 176 480 176 416
+FLAG 176 480 0
+FLAG 1136 96 out
+IOPIN 1136 96 Out
+SYMBOL current -192 352 R180
+WINDOW 0 24 80 Left 2
+WINDOW 3 -257 5 Left 2
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName I1
+SYMATTR Value SINE(0 25u 1KHz)
+SYMBOL voltage 800 176 R0
+SYMATTR InstName V1
+SYMATTR Value 3.3v
+SYMBOL npn 304 176 R0
+SYMATTR InstName Q1
+SYMATTR Value 2N3904
+SYMBOL cap 80 208 R90
+WINDOW 0 0 32 VBottom 2
+WINDOW 3 32 32 VTop 2
+SYMATTR InstName C1
+SYMATTR Value 10ｵ
+SYMBOL cap 576 80 R90
+WINDOW 0 0 32 VBottom 2
+WINDOW 3 32 32 VTop 2
+SYMATTR InstName C2
+SYMATTR Value 10ｵ
+SYMBOL res 352 -176 R0
+SYMATTR InstName R1
+SYMATTR Value 680
+SYMBOL res 144 48 R0
+SYMATTR InstName R2
+SYMATTR Value 36k
+SYMBOL res 1024 192 R0
+SYMATTR InstName R3
+SYMATTR Value 20k
+SYMBOL voltage -576 256 R0
+WINDOW 123 0 0 Left 0
+WINDOW 39 0 0 Left 0
+SYMATTR InstName V2
+SYMATTR Value SINE(0 25u 1KHz)
+TEXT -208 -176 Left 2 !.tran 3m

--- /dev/null
+++ b/work1.txt
@@ -0,0 +1,26 @@
+
+fixed bias:
+
+Ic = 2.5m
+Ib = 25u
+
+Rl = 1.7 / 2.5m
+ = 680
+
+
+Rb = (3.3 - 0.7) / 25u
+ = 105k
+
+
+-----------------
+
+
+Rl = vcc/2/ic
+ = 680
+
+Rb = (vce - vbe) / ib
+ = (vcc - ic * Rl - vbe) / ib
+ = (3.3 - 1.7 - 0.7) / 25u
+ = 0.9 / 25u
+ = 36k
+