JPH0439721U - - Google Patents
Info
- Publication number
- JPH0439721U JPH0439721U JP8210390U JP8210390U JPH0439721U JP H0439721 U JPH0439721 U JP H0439721U JP 8210390 U JP8210390 U JP 8210390U JP 8210390 U JP8210390 U JP 8210390U JP H0439721 U JPH0439721 U JP H0439721U
- Authority
- JP
- Japan
- Prior art keywords
- digital data
- amplifier
- temperature
- terminal
- power 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Amplifiers (AREA)
- Control Of Amplification And Gain Control (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は温度変化を示す図、第３図は電子アツテ
ネータの回路図、第４図は入力ビツト対減衰量を
示す図、第５図はシステム制御フローチヤートで
ある。
１……パワーアンプ、２……スピーカ、３……
電子アツテネータ、４……プリアンプ、５……温
度検出器、６……ＡＤ、７……マイクロコンピユ
ータ、８……制御線、９……インプツト端子、１
０，１１……アツテネータ、１２……オペアンプ
、１３……出力端子、１４……ストローブ端子、
１５……クロツク端子、１６……データ端子であ
る。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a diagram showing temperature changes, FIG. 3 is a circuit diagram of an electronic attenuator, FIG. 4 is a diagram showing input bits versus attenuation, and FIG. 5 is a system control flowchart. 1...Power amplifier, 2...Speaker, 3...
Electronic attenuator, 4...Preamplifier, 5...Temperature detector, 6...AD, 7...Microcomputer, 8...Control line, 9...Input terminal, 1
0, 11... Attenuator, 12... Operational amplifier, 13... Output terminal, 14... Strobe terminal,
15... clock terminal, 16... data terminal.
Claims (1)
タに変換するＡ／Ｄコンバータを具備し、前記デ
ジタルデータにより、音量を制御することを特徴
としたパワーアンプ。 A power amplifier comprising an A/D converter that detects the temperature inside the amplifier and converts the temperature into digital data, and controls the volume based on the digital data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8210390U JPH0439721U (en) | 1990-07-31 | 1990-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8210390U JPH0439721U (en) | 1990-07-31 | 1990-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0439721U true JPH0439721U (en) | 1992-04-03 |
Family
ID=31628623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8210390U Pending JPH0439721U (en) | 1990-07-31 | 1990-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439721U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120754A (en) * | 2002-09-23 | 2004-04-15 | Harman Internatl Industries Inc | Thermal protection system for the output stage of an amplifier |
| JP2012222702A (en) * | 2011-04-12 | 2012-11-12 | Kyocera Corp | Portable communication terminal, power amplification control method and program |
-
1990
- 1990-07-31 JP JP8210390U patent/JPH0439721U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120754A (en) * | 2002-09-23 | 2004-04-15 | Harman Internatl Industries Inc | Thermal protection system for the output stage of an amplifier |
| JP2012222702A (en) * | 2011-04-12 | 2012-11-12 | Kyocera Corp | Portable communication terminal, power amplification control method and program |
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