JPH0383435U - - Google Patents
Info
- Publication number
- JPH0383435U JPH0383435U JP14327289U JP14327289U JPH0383435U JP H0383435 U JPH0383435 U JP H0383435U JP 14327289 U JP14327289 U JP 14327289U JP 14327289 U JP14327289 U JP 14327289U JP H0383435 U JPH0383435 U JP H0383435U
- Authority
- JP
- Japan
- Prior art keywords
- amplifier circuit
- circuit
- power
- temperature detection
- push
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000013021 overheating Methods 0.000 claims 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の電力増幅回路を示す回路図、
第２図は従来回路を示す回路図である。
１……Ｂ級プツシユプル増幅回路、１０……温
度検出トランジスタ、１３……駆動トランジスタ
、１５……カレントミラー回路、１６，１７，２
４……トランジスタ、２７……コンパレータ。
FIG. 1 is a circuit diagram showing the power amplifier circuit of the present invention,
FIG. 2 is a circuit diagram showing a conventional circuit. 1 ...Class B push-pull amplifier circuit, 10...Temperature detection transistor, 13...Drive transistor, 15 ...Current mirror circuit, 16, 17, 2
4...Transistor, 27...Comparator.
Claims (1)
増幅回路と、該プツシユプル増幅回路にバイアス
電流を供給するバイアス供給回路と、前記プツシ
ユプル増幅回路を構成する出力トランジスタが過
熱状態になつたことを検出する温度検出回路とを
備え、過熱状態で前記出力トランジスタが熱で破
壊されるのを防止する電力増幅回路において、 前記温度検出回路が所定温度になつたことを検
知した時に発生する温度検知信号に応じて前記バ
イアス供給回路をオフさせる第１の手段と、 前記温度検知信号に応じて前記プツシユプル増
幅回路の駆動トランジスタをオフさせる第２の手
段と、 前記第１及び第２電源が異常状態の時に発生す
る電源検知信号と基準信号とを比較する第３の手
段と、 前記第３の手段の比較信号に応じて前記バイア
ス供給回路及び前記駆動トランジスタをオフさせ
る第４の手段と、 を備えたことを特徴とする電力増幅回路。 (2) 前記第１及び第２電源は、夫々正電源及び
負電源であることを特徴とする請求項(1)記載の
電力増幅回路。 (3) 前記第１及び第２電源は、夫々正電源及び
アースであることを特徴とする請求項(1)記載の
電力増幅回路。[Claims for Utility Model Registration] (1) A push-pull amplifier circuit that operates on first and second power supplies, a bias supply circuit that supplies a bias current to the push-pull amplifier circuit, and an output transistor that constitutes the push-pull amplifier circuit. and a temperature detection circuit for detecting an overheating state, the power amplifier circuit for preventing the output transistor from being destroyed by heat in the overheating state, wherein the temperature detection circuit detects that a predetermined temperature has been reached. a first means for turning off the bias supply circuit in response to a temperature detection signal generated when the temperature detection signal is generated; a second means for turning off the drive transistor of the push-pull amplifier circuit in response to the temperature detection signal; a third means for comparing a power supply detection signal generated when the second power supply is in an abnormal state with a reference signal; and a fourth means for turning off the bias supply circuit and the drive transistor in response to the comparison signal of the third means. A power amplification circuit characterized by comprising means for: and. (2) The power amplifier circuit according to claim (1), wherein the first and second power supplies are a positive power supply and a negative power supply, respectively. (3) The power amplifier circuit according to claim (1), wherein the first and second power supplies are a positive power supply and a ground, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14327289U JPH0383435U (en) | 1989-12-12 | 1989-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14327289U JPH0383435U (en) | 1989-12-12 | 1989-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0383435U true JPH0383435U (en) | 1991-08-26 |
Family
ID=31690051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14327289U Pending JPH0383435U (en) | 1989-12-12 | 1989-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0383435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005041475A (en) * | 2003-05-30 | 2005-02-17 | Hung Chang Chao | Telescopic bicycle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60229508A (en) * | 1984-04-27 | 1985-11-14 | Mitsubishi Electric Corp | Audio amplifier |
| JPS63157609A (en) * | 1986-12-19 | 1988-06-30 | 富士通株式会社 | Electric source feeding circuit |
| JPS6439107A (en) * | 1987-08-03 | 1989-02-09 | Rohm Co Ltd | Amplifier circuit |
-
1989
- 1989-12-12 JP JP14327289U patent/JPH0383435U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60229508A (en) * | 1984-04-27 | 1985-11-14 | Mitsubishi Electric Corp | Audio amplifier |
| JPS63157609A (en) * | 1986-12-19 | 1988-06-30 | 富士通株式会社 | Electric source feeding circuit |
| JPS6439107A (en) * | 1987-08-03 | 1989-02-09 | Rohm Co Ltd | Amplifier circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005041475A (en) * | 2003-05-30 | 2005-02-17 | Hung Chang Chao | Telescopic bicycle |
| JP4565892B2 (en) * | 2003-05-30 | 2010-10-20 | 弘昌 趙 | Telescopic bicycle |