JPS6485406A - Acoustic amplifier - Google Patents

Acoustic amplifier

Info

Publication number
JPS6485406A
JPS6485406A JP62242922A JP24292287A JPS6485406A JP S6485406 A JPS6485406 A JP S6485406A JP 62242922 A JP62242922 A JP 62242922A JP 24292287 A JP24292287 A JP 24292287A JP S6485406 A JPS6485406 A JP S6485406A
Authority
JP
Japan
Prior art keywords
circuit
power amplifier
constitution
signal
power
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
Application number
JP62242922A
Other languages
Japanese (ja)
Other versions
JP2538277B2 (en
Inventor
Tamotsu Itoi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP62242922A priority Critical patent/JP2538277B2/en
Publication of JPS6485406A publication Critical patent/JPS6485406A/en
Application granted granted Critical
Publication of JP2538277B2 publication Critical patent/JP2538277B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To simplify the circuit constitution by multiplying a digital signal with a digital data setting an attenuation factor of an electronic volume, detecting the signal level given to a power amplifier circuit from the multiplied value so as to switch a level of a power voltage impressed to the power amplifier circuit. CONSTITUTION:While a digital signal being audio information is sent to the power amplifier circuit 7 with a delay by a delay element 3, a multiplier 19 multiplies the digital signal with a digital data setting the attenuation rate of the volume. Then the signal level given to the power amplification circuit 7 is detected by the multiplication value to switch the level of the power voltage impressed to the power amplifier 7. Then the circuit generating a switching signal consists of a microcomputer 11, a storage element 3, the electronic volume 6 and its selection circuit 10 are controlled by the microcomputer 11. Thus, the circuit constitution is simplified.
JP62242922A 1987-09-28 1987-09-28 Acoustic amplifier Expired - Lifetime JP2538277B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62242922A JP2538277B2 (en) 1987-09-28 1987-09-28 Acoustic amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62242922A JP2538277B2 (en) 1987-09-28 1987-09-28 Acoustic amplifier

Publications (2)

Publication Number Publication Date
JPS6485406A true JPS6485406A (en) 1989-03-30
JP2538277B2 JP2538277B2 (en) 1996-09-25

Family

ID=17096204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62242922A Expired - Lifetime JP2538277B2 (en) 1987-09-28 1987-09-28 Acoustic amplifier

Country Status (1)

Country Link
JP (1) JP2538277B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006033204A (en) * 2004-07-14 2006-02-02 Toshiba Corp Audio signal processing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004015855A1 (en) * 2002-07-29 2004-02-19 Sharp Kabushiki Kaisha Volume adjustment device, digital amplifier, and digital signal reproducing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038044A (en) * 1983-08-10 1985-02-27 株式会社日立製作所 Coal crushing method
JPS6042908A (en) * 1983-08-19 1985-03-07 Pioneer Electronic Corp Noise eliminating system
JPS60177507U (en) * 1984-04-28 1985-11-26 日本電気ホームエレクトロニクス株式会社 Variable idle current power amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038044A (en) * 1983-08-10 1985-02-27 株式会社日立製作所 Coal crushing method
JPS6042908A (en) * 1983-08-19 1985-03-07 Pioneer Electronic Corp Noise eliminating system
JPS60177507U (en) * 1984-04-28 1985-11-26 日本電気ホームエレクトロニクス株式会社 Variable idle current power amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006033204A (en) * 2004-07-14 2006-02-02 Toshiba Corp Audio signal processing apparatus

Also Published As

Publication number Publication date
JP2538277B2 (en) 1996-09-25

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