Amplifier circuits: Difference between revisions
Created page with "== Amplifier types == === Common emitter amplifier === thumb|Common emitter amplifier in the Falstad circuit simulator Falstad circuit emulator text<ref>[https://www.falstad.com/circuit/ Circuit Simulator Applet] ''www.falstad.com/circuit''</ref>:<pre> $ 1 0.000005 13.097415321081861 66 5 50 5e-11 t 208 208 288 208 0 1 -6.335290598254659 0.6267237961459291 100 default r 288 192 288 96 0 1200 r 208 208 208 96 0 20000 w 208 96 288 96..." |
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As I'm studying for my 3rd class Amateur radio certificate<ref>[https://www.nichimu.or.jp/kshiken/#:~:text=%E7%AC%AC%E4%B8%89%E7%B4%9A%E3%82%A2%E3%83%9E%E3%83%81%E3%83%A5%E3%82%A2%E7%84%A1%E7%B7%9A%E6%8A%80%E5%A3%AB 国家試験 受験案内] ''www.nichimu.org''.jp</ref> in Japan<ref>I realize writing this resembles "Photo of X -> :|, Photo of X in Japan :O"</ref>, I wanted to write down some notes on amplifier circuits. | |||
== Amplifier types == | == Amplifier types == | ||
=== Common emitter amplifier === | === Common emitter amplifier === | ||
[[File:Common emitter amplifier.png|thumb|Common emitter amplifier in the Falstad circuit simulator]] | [[File:Common emitter amplifier.png|thumb|Common emitter amplifier in the Falstad circuit simulator]] | ||
In Japanese, this called エミッタ接地増幅回路<ref>第3級ハム国試要点マスター 2026年版発行 CQ出版社 ISBN978-4-7898-1932-9</ref>. | |||
Falstad circuit emulator text<ref>[https://www.falstad.com/circuit/ Circuit Simulator Applet] ''www.falstad.com/circuit''</ref>:<pre> | Falstad circuit emulator text<ref>[https://www.falstad.com/circuit/ Circuit Simulator Applet] ''www.falstad.com/circuit''</ref>:<pre> | ||
$ 1 0.000005 13.097415321081861 66 5 50 5e-11 | $ 1 0.000005 13.097415321081861 66 5 50 5e-11 | ||
| Line 31: | Line 35: | ||
* The output voltage is 180 degrees out of phase with the input voltage. | * The output voltage is 180 degrees out of phase with the input voltage. | ||
* Increasing the AC frequency from 100 Hz to 1000 Hz introduces clipping on the output. | * Increasing the AC frequency from 100 Hz to 1000 Hz introduces clipping on the output. | ||
== Notes == | |||
Latest revision as of 23:16, 14 March 2026
As I'm studying for my 3rd class Amateur radio certificate[1] in Japan[2], I wanted to write down some notes on amplifier circuits.
Amplifier types
Common emitter amplifier
In Japanese, this called エミッタ接地増幅回路[3].
Falstad circuit emulator text[4]:
$ 1 0.000005 13.097415321081861 66 5 50 5e-11 t 208 208 288 208 0 1 -6.335290598254659 0.6267237961459291 100 default r 288 192 288 96 0 1200 r 208 208 208 96 0 20000 w 208 96 288 96 0 v 96 352 96 208 16 1 100 1 0 0 0.5 c 208 208 96 208 4 0.000003 1.3999061550528193 0.001 0 w 96 352 208 352 0 c 336 224 336 352 4 0.0000022999999999999996 1.0340239322574427 0.001 0 w 336 352 416 352 0 p 416 192 416 352 3 0 0 10000000 R 416 96 448 96 0 0 40 12 0 0 0.5 w 288 96 416 96 0 207 416 192 448 192 4 Vout g 288 352 288 384 0 0 w 416 192 288 192 0 w 336 352 288 352 0 r 288 224 288 352 0 220 w 288 224 336 224 0 207 416 352 448 352 4 0v r 208 208 208 352 0 3600 w 208 352 288 352 0 o 4 64 0 x281012 8.250148878587748 0.0001 0 3 0 20 0 4 3 Infinity 0 9 0 500 0
Observations:
- The output voltage is 180 degrees out of phase with the input voltage.
- Increasing the AC frequency from 100 Hz to 1000 Hz introduces clipping on the output.