JPH01107213U - - Google Patents
Info
- Publication number
- JPH01107213U JPH01107213U JP101188U JP101188U JPH01107213U JP H01107213 U JPH01107213 U JP H01107213U JP 101188 U JP101188 U JP 101188U JP 101188 U JP101188 U JP 101188U JP H01107213 U JPH01107213 U JP H01107213U
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- output
- circuit
- power amplifier
- base
- 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
- 238000006243 chemical reaction Methods 0.000 claims 3
- 101000684181 Homo sapiens Selenoprotein P Proteins 0.000 claims 2
- 102100023843 Selenoprotein P Human genes 0.000 claims 2
- 229940119265 sepp Drugs 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案一実施例による等価回路図であ
る。
FIG. 1 is an equivalent circuit diagram according to an embodiment of the present invention.
Claims (1)
る手段と、該検出電流を電圧に変換するＩ／Ｖ変
換回路を有し、該Ｉ／Ｖ変換回路の出力端をＮＰ
Ｎトランジスタのベースに接続し、該ＮＰＮトラ
ンジスタのコレクタを上側ドライバトランジスタ
のベースに、エミツタを出力端子に接続してなる
出力端子―ＧＮＤ端子間シヨート保護回路に於い
て、該ＳＥＰＰ電力増幅回路の入力バイアス点の
電圧を基準入力とし入力信号の正負を判別するコ
ンパレータを有し、該コンパレータの出力にスイ
ツチ用トランジスタのベースを接続し、該スイツ
チ用トランジスタのエミツタをＧＮＤ端子に、コ
レクタを該Ｉ／Ｖ変換回路の出力端に接続したこ
とを特徴とする電力増幅回路の保護回路。 It has means for detecting the upper output current of the SEPP power amplifier circuit, and an I/V conversion circuit that converts the detected current into a voltage, and the output terminal of the I/V conversion circuit is NP.
In a short protection circuit between an output terminal and a GND terminal, the input terminal of the SEPP power amplifier circuit is connected to the base of an NPN transistor, the collector of the NPN transistor is connected to the base of the upper driver transistor, and the emitter is connected to the output terminal. It has a comparator that uses the voltage at the bias point as a reference input and determines whether the input signal is positive or negative.The base of the switching transistor is connected to the output of the comparator, the emitter of the switching transistor is connected to the GND terminal, and the collector is connected to the I/O terminal. A protection circuit for a power amplifier circuit, characterized in that it is connected to the output end of a V conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP101188U JPH01107213U (en) | 1988-01-08 | 1988-01-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP101188U JPH01107213U (en) | 1988-01-08 | 1988-01-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107213U true JPH01107213U (en) | 1989-07-19 |
Family
ID=31200525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP101188U Pending JPH01107213U (en) | 1988-01-08 | 1988-01-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107213U (en) |
-
1988
- 1988-01-08 JP JP101188U patent/JPH01107213U/ja active Pending