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
Application number
JP8210390U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP8210390U priority Critical patent/JPH0439721U/ja
Publication of JPH0439721U publication Critical patent/JPH0439721U/ja
Pending legal-status Critical Current

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  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

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)

【実用新案登録請求の範囲】[Scope of utility model registration request] アンプ内の温度を検出し、温度をデジタルデー
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.
JP8210390U 1990-07-31 1990-07-31 Pending JPH0439721U (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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