JPS5854120U - Amplifier circuit protection circuit - Google Patents
Amplifier circuit protection circuitInfo
- Publication number
- JPS5854120U JPS5854120U JP14736381U JP14736381U JPS5854120U JP S5854120 U JPS5854120 U JP S5854120U JP 14736381 U JP14736381 U JP 14736381U JP 14736381 U JP14736381 U JP 14736381U JP S5854120 U JPS5854120 U JP S5854120U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- circuit
- emitter
- amplifier circuit
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Amplifiers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案が適用される増幅器の一例を示す回路図
、第２図は本考案の一実施例である。
図中、３はＦＥＴ、５は定電流源、６及び１０はトラン
ジスタである。FIG. 1 is a circuit diagram showing an example of an amplifier to which the present invention is applied, and FIG. 2 is an embodiment of the present invention. In the figure, 3 is an FET, 5 is a constant current source, and 6 and 10 are transistors.
Claims (1)
記ＦＥＴと導電型が異なりコレクタから出力信号が導出
される第１のトランジスタのエミッタとを接続し、その
接続点と電源との間に定電流源を接続した増幅回路にお
いて、上記第１のトランジスタと導電型の異なる第２の
トランジスタのエミッタに上記第１のトランジスタのエ
ミッタを接続し、上記第２のトランジスタのコレクタを
抵抗を介して上記電源に接続し、上記第２のトランジス
タのベースを上記第１のトランジスタのベースに接続し
たことを特徴とする増幅回路の保護回路。The drain of the FET to which an input signal is applied to the gate is connected to the emitter of a first transistor whose conductivity type is different from the actual FET and the output signal is derived from the collector, and a constant current is applied between the connection point and the power supply. In the amplifier circuit connected to the power source, the emitter of the first transistor is connected to the emitter of a second transistor having a different conductivity type from the first transistor, and the collector of the second transistor is connected to the power source through a resistor. A protection circuit for an amplifier circuit, characterized in that the base of the second transistor is connected to the base of the first transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14736381U JPS5854120U (en) | 1981-10-03 | 1981-10-03 | Amplifier circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14736381U JPS5854120U (en) | 1981-10-03 | 1981-10-03 | Amplifier circuit protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5854120U true JPS5854120U (en) | 1983-04-13 |
| JPS6324652Y2 JPS6324652Y2 (en) | 1988-07-06 |
Family
ID=29940224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14736381U Granted JPS5854120U (en) | 1981-10-03 | 1981-10-03 | Amplifier circuit protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5854120U (en) |
-
1981
- 1981-10-03 JP JP14736381U patent/JPS5854120U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6324652Y2 (en) | 1988-07-06 |
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