JPS6485406A - Acoustic amplifier - Google Patents
Acoustic amplifierInfo
- 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
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.
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)
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)
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)
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 |
-
1987
- 1987-09-28 JP JP62242922A patent/JP2538277B2/en not_active Expired - Lifetime
Patent Citations (3)
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)
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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