JPH0423315U - - Google Patents
Info
- Publication number
- JPH0423315U JPH0423315U JP6346290U JP6346290U JPH0423315U JP H0423315 U JPH0423315 U JP H0423315U JP 6346290 U JP6346290 U JP 6346290U JP 6346290 U JP6346290 U JP 6346290U JP H0423315 U JPH0423315 U JP H0423315U
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- circuit
- current mirror
- component
- audio
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 230000005236 sound signal Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Amplifiers (AREA)
Description
第1図は本考案に係わるオーデイオ・アンプの
回路図、第2図は従来のオーデイオ・アンプの回
路図である。
11……信号入力回路、12,13……差動ア
ンプ、14……バイアス回路、15……カレント
ミラー回路、16……電力増幅器、21……直流
検出回路、22……直流増幅器、23……制御部
。
FIG. 1 is a circuit diagram of an audio amplifier according to the present invention, and FIG. 2 is a circuit diagram of a conventional audio amplifier. 11...Signal input circuit, 12, 13...Differential amplifier, 14...Bias circuit, 15...Current mirror circuit, 16...Power amplifier, 21...DC detection circuit, 22...DC amplifier, 23... ...control section.
Claims (1)
動アンプに接続された定電流源用のカレントミラ
ー回路と、差動アンプで増幅されたオーデイオ信
号を更に増幅して出力する電力増幅器と、所定の
バイアス電圧を電力増幅器に印加するバイアス回
路を備えたオーデイオ・アンプにおいて、 出力信号に含まれる直流分を検出する直流検出
回路と、検出した直流分でカレントミラー回路を
制御し、該直流分を中和する方向にバイアス電圧
を増加あるいは減少させる制御回路を備えたこと
を特徴とするオーデイオ・アンプ。[Claims for Utility Model Registration] A differential amplifier that amplifies an audio signal, a current mirror circuit for a constant current source connected to the differential amplifier, and a current mirror circuit for further amplifying the audio signal amplified by the differential amplifier. In an audio amplifier equipped with an output power amplifier and a bias circuit that applies a predetermined bias voltage to the power amplifier, there is a DC detection circuit that detects the DC component included in the output signal, and a current mirror circuit that uses the detected DC component. An audio amplifier comprising a control circuit that increases or decreases a bias voltage in a direction to neutralize the direct current component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6346290U JPH0423315U (en) | 1990-06-15 | 1990-06-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6346290U JPH0423315U (en) | 1990-06-15 | 1990-06-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0423315U true JPH0423315U (en) | 1992-02-26 |
Family
ID=31593536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6346290U Pending JPH0423315U (en) | 1990-06-15 | 1990-06-15 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0423315U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7869773B2 (en) | 2004-08-06 | 2011-01-11 | Nxp B.V. | RF power sensing circuit |
-
1990
- 1990-06-15 JP JP6346290U patent/JPH0423315U/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7869773B2 (en) | 2004-08-06 | 2011-01-11 | Nxp B.V. | RF power sensing circuit |