JPH02138917U - - Google Patents
Info
- Publication number
- JPH02138917U JPH02138917U JP4770989U JP4770989U JPH02138917U JP H02138917 U JPH02138917 U JP H02138917U JP 4770989 U JP4770989 U JP 4770989U JP 4770989 U JP4770989 U JP 4770989U JP H02138917 U JPH02138917 U JP H02138917U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- protection circuit
- power amplifier
- stage
- abnormal current
- 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.)
- Pending
Links
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Amplifiers (AREA)
Description
第１図はこの考案に係るトランジスタ電力増幅
器に保護回路の一実施例を示す回路図である。第
２図は従来例のトランジスタ電力増幅器の保護回
路を示す回路図である。
主な符号の説明、Ｑ１，Ｑ２，Ｑ３……並列接
続の終段トランジスタ、Ｑ４……トランジスタ、
Ｑ５……異常電流が流れるのを制限するトランジ
スタ、Ｄ１，Ｄ２，Ｄ３……ダイオード、ｉ……
信号電流源。
FIG. 1 is a circuit diagram showing an embodiment of a protection circuit for a transistor power amplifier according to the invention. FIG. 2 is a circuit diagram showing a protection circuit for a conventional transistor power amplifier. Explanation of main symbols, Q 1 , Q 2 , Q 3 ... Parallel connected final stage transistor, Q 4 ... Transistor,
Q5 ...transistor that limits abnormal current flow, D1 , D2 , D3 ...diode, i...
Signal current source.
Claims (1)
したトランジスタ電力増幅器において、各終段ト
ランジスタのエミツタ信号をそれぞれダイオード
を経て合成するように接続し、異常電流が終段ト
ランジスタに流れたときに、これを制限するよう
に構成したことを特徴とするトランジスタ電力増
幅器の保護回路。 In a transistor power amplifier that uses multiple end-stage transistors connected in parallel, the emitter signals of each end-stage transistor are connected to be combined via diodes, and when an abnormal current flows to the end-stage transistor, this is A protection circuit for a transistor power amplifier, characterized in that the protection circuit is configured to limit the power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4770989U JPH02138917U (en) | 1989-04-25 | 1989-04-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4770989U JPH02138917U (en) | 1989-04-25 | 1989-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02138917U true JPH02138917U (en) | 1990-11-20 |
Family
ID=31563878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4770989U Pending JPH02138917U (en) | 1989-04-25 | 1989-04-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02138917U (en) |
-
1989
- 1989-04-25 JP JP4770989U patent/JPH02138917U/ja active Pending