JPS6451315U - - Google Patents
Info
- Publication number
- JPS6451315U JPS6451315U JP14555187U JP14555187U JPS6451315U JP S6451315 U JPS6451315 U JP S6451315U JP 14555187 U JP14555187 U JP 14555187U JP 14555187 U JP14555187 U JP 14555187U JP S6451315 U JPS6451315 U JP S6451315U
- Authority
- JP
- Japan
- Prior art keywords
- power amplification
- amplification transistor
- signal
- collector
- photocoupler
- 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
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図はこの考案の一実施例を示す電力増幅器
の構成例を示す図、第２図は従来の電力増幅器の
構成例を示す図、第３図はトランジスタのコレク
タ〜エミツタ間電圧とコレクタ電流の関係を示す
図である。
図中、１はパルス発振器、２は電力増幅用トラ
ンジスタ、３は負荷、４は電源、５はベース電流
、６はコレクタ電流、７はホトカプラー、８は論
理回路、９はコレクタ電流６を遮断する開閉器、
１０は異常電圧設定用抵抗器である。なお、図中
同一あるいは相当部分には同一符号を付して示し
てある。
Fig. 1 is a diagram showing an example of the configuration of a power amplifier showing an embodiment of this invention, Fig. 2 is a diagram showing an example of the configuration of a conventional power amplifier, and Fig. 3 is a diagram showing the collector-emitter voltage and collector current of a transistor. FIG. In the figure, 1 is a pulse oscillator, 2 is a power amplification transistor, 3 is a load, 4 is a power supply, 5 is a base current, 6 is a collector current, 7 is a photocoupler, 8 is a logic circuit, and 9 interrupts the collector current 6. switch,
10 is an abnormal voltage setting resistor. It should be noted that the same or corresponding parts in the figures are indicated by the same reference numerals.
Claims (1)
にスイツチング指令を与えるパルス発振器と、電
力増幅用トランジスタのコレクタ〜エミツタ間の
電圧を検出するホトカプラーと、そのホトカプラ
ーからの信号と前記の発信器の信号の論理積を生
成する論理回路と、論理回路からの信号を受けて
電力増幅用トランジスタのコレクタ電流をしや断
する開閉器とから構成され、電力増幅用トランジ
スタのコレクタ〜エミツタ間の電圧が異常に上昇
した場合に、前記電力増幅用トランジスタが破壊
されることを防ぐようにしたことを特徴とする電
力増幅器保護装置。 A power amplification transistor, a pulse oscillator that gives a switching command to the transistor, a photocoupler that detects the voltage between the collector and emitter of the power amplification transistor, and a logical product of the signal from the photocoupler and the signal from the oscillator. It consists of a logic circuit that generates a signal and a switch that receives a signal from the logic circuit and cuts off the collector current of the power amplification transistor.If the voltage between the collector and emitter of the power amplification transistor increases abnormally. A power amplifier protection device characterized in that the power amplification transistor is prevented from being destroyed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14555187U JPS6451315U (en) | 1987-09-24 | 1987-09-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14555187U JPS6451315U (en) | 1987-09-24 | 1987-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6451315U true JPS6451315U (en) | 1989-03-30 |
Family
ID=31414239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14555187U Pending JPS6451315U (en) | 1987-09-24 | 1987-09-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6451315U (en) |
-
1987
- 1987-09-24 JP JP14555187U patent/JPS6451315U/ja active Pending