JPH0312532U - - Google Patents
Info
- Publication number
- JPH0312532U JPH0312532U JP7228489U JP7228489U JPH0312532U JP H0312532 U JPH0312532 U JP H0312532U JP 7228489 U JP7228489 U JP 7228489U JP 7228489 U JP7228489 U JP 7228489U JP H0312532 U JPH0312532 U JP H0312532U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- temperature detection
- push
- amplifier circuit
- pull 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Protection Of Static Devices (AREA)
- 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、１６，１７，２４…トラ
ンジスタ。
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, 24...transistor.
Claims (1)
、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手段と、 前記正負二電源が異常状態の時に発生する電源
検知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手段と、 を備えたことを特徴とする電力増幅回路。[Claims for Utility Model Registration] A push-pull amplifier circuit that operates with two positive and negative power supplies, a bias supply circuit that supplies bias current to the push-pull amplifier circuit, and an output transistor constituting the push-pull amplifier circuit become overheated. and a temperature detection circuit that detects temperature detection circuit that prevents the output transistor from being destroyed by heat in an overheated state, the temperature detection circuit that occurs when the temperature detection circuit detects that the temperature has reached a predetermined temperature. means for turning off the bias supply circuit in response to a signal; means for turning off a drive transistor of the push-pull amplifier circuit in response to the temperature detection signal; and means for turning off the drive transistor of the push-pull amplifier circuit in response to the temperature detection signal; A power amplifier circuit comprising: means for turning off the bias supply circuit and the drive transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7228489U JPH0644173Y2 (en) | 1989-06-20 | 1989-06-20 | Power amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7228489U JPH0644173Y2 (en) | 1989-06-20 | 1989-06-20 | Power amplifier circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0312532U true JPH0312532U (en) | 1991-02-07 |
| JPH0644173Y2 JPH0644173Y2 (en) | 1994-11-14 |
Family
ID=31610088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7228489U Expired - Lifetime JPH0644173Y2 (en) | 1989-06-20 | 1989-06-20 | Power amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0644173Y2 (en) |
-
1989
- 1989-06-20 JP JP7228489U patent/JPH0644173Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0644173Y2 (en) | 1994-11-14 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |