JPS60192512U - power amplifier - Google Patents
power amplifierInfo
- Publication number
- JPS60192512U JPS60192512U JP8026284U JP8026284U JPS60192512U JP S60192512 U JPS60192512 U JP S60192512U JP 8026284 U JP8026284 U JP 8026284U JP 8026284 U JP8026284 U JP 8026284U JP S60192512 U JPS60192512 U JP S60192512U
- Authority
- JP
- Japan
- Prior art keywords
- output terminal
- speaker
- power amplifier
- deriving
- connect
- 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
- Amplifiers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係る電力増幅回路の一実施例を示す回
路図、第２図及び第３図はそれぞれ本考案において用い
る検出器の他の実施例を示す回路図である。 ゛
１．２・・・・・・電力増幅器、３，４・・・・・・ミ
ューティーング用切換器、５・・・・・・Ｈｏｔ端子、
６・・・・・・Ｃｏ１ｄ端子、９・・・・・・基準電圧
源、１０・・・・・・検出器、１１・・・′ −・・・
制御回路、１２１ｔ １’２ ｂｖ １２ ｃ”・
・ＢＴ’Ｌ−並列切換回路。FIG. 1 is a circuit diagram showing one embodiment of the power amplifier circuit according to the present invention, and FIGS. 2 and 3 are circuit diagrams showing other embodiments of the detector used in the present invention.゛1.2...Power amplifier, 3,4...Muting switch, 5...Hot terminal,
6...Co1d terminal, 9...Reference voltage source, 10...Detector, 11...' -...
Control circuit, 121t 1'2 bv 12 c"・
・BT'L-parallel switching circuit.
Claims (1)
、第２の増幅器の出力を第１の出力端子に導出して並列
接続とするか第２の出力端子に導出してＢＴＬ接続とす
るかを選択する選択手段と、電源投入直後の所定期間中
出力を遮断するミューティング手段と、スピーカインピ
ーダンス検出手段とを有する電力増幅器において、上記
ミューティング手段は第１のスピーカ接続端子を上記第
１の出力端子に接続するか接地するかを選択する第１の
切換手段と、第２の′スピーカ接続端子を上記第２の出
力端子に接続するか上記スピーカインピーダンス検出手
段に接続するかを選択する第２の切換手段とを有するこ
とによりミューティング期間中はスピーカインピーダン
スを検出する様にし、上記スピーカインピーダンスが所
定値以下のとき上記選択手段を制御して上記電力増幅器
を並列接続とすることを特徴とする電力増幅器。means for deriving the output of the first amplifier to the first output terminal; and means for deriving the output of the second amplifier to the first output terminal for parallel connection or for deriving it to the second output terminal for BTL connection; In the power amplifier, the muting means has a selection means for selecting whether the first speaker connection terminal is connected to the a first switching means for selecting whether to connect to the first output terminal or grounding; and a second switching means for selecting whether to connect the speaker connection terminal to the second output terminal or to the speaker impedance detection means. and second switching means for selecting, so that speaker impedance is detected during the muting period, and when the speaker impedance is below a predetermined value, the selection means is controlled to connect the power amplifiers in parallel. A power amplifier featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8026284U JPS60192512U (en) | 1984-05-30 | 1984-05-30 | power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8026284U JPS60192512U (en) | 1984-05-30 | 1984-05-30 | power amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60192512U true JPS60192512U (en) | 1985-12-20 |
| JPH0141220Y2 JPH0141220Y2 (en) | 1989-12-06 |
Family
ID=30625945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8026284U Granted JPS60192512U (en) | 1984-05-30 | 1984-05-30 | power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60192512U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6380929U (en) * | 1986-11-17 | 1988-05-27 | ||
| WO2006090758A1 (en) * | 2005-02-24 | 2006-08-31 | Matsushita Electric Industrial Co., Ltd. | A/v amplifier and method for driving the same |
| JP4721859B2 (en) * | 2005-10-13 | 2011-07-13 | シャープ株式会社 | Audio amplifier |
-
1984
- 1984-05-30 JP JP8026284U patent/JPS60192512U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6380929U (en) * | 1986-11-17 | 1988-05-27 | ||
| WO2006090758A1 (en) * | 2005-02-24 | 2006-08-31 | Matsushita Electric Industrial Co., Ltd. | A/v amplifier and method for driving the same |
| JP4721859B2 (en) * | 2005-10-13 | 2011-07-13 | シャープ株式会社 | Audio amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0141220Y2 (en) | 1989-12-06 |
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