JPS5981114U - Power amplifier bias control device - Google Patents
Power amplifier bias control deviceInfo
- Publication number
- JPS5981114U JPS5981114U JP17748282U JP17748282U JPS5981114U JP S5981114 U JPS5981114 U JP S5981114U JP 17748282 U JP17748282 U JP 17748282U JP 17748282 U JP17748282 U JP 17748282U JP S5981114 U JPS5981114 U JP S5981114U
- Authority
- JP
- Japan
- Prior art keywords
- power amplifier
- load
- voltage
- control device
- count value
- 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
- 238000010586 diagram Methods 0.000 description 1
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案の一実施例を示すブロック図である。
図中、８・・・定電流回路、１６・・・記憶回路、１７
・・・カウンタ、１８・・・クロック、１９・・・バイ
アス制御回路である。The figure is a block diagram showing one embodiment of the present invention. In the figure, 8...constant current circuit, 16...memory circuit, 17
. . . counter, 18 . . . clock, 19 . . . bias control circuit.
Claims (1)
間負荷を遮断するミューティング用切換器を有する電力
増幅器に於て、ミューティング時間中に負荷側に直流信
号を印加し、負荷インピーダンスに対応する電圧を発生
させる手段と、電源投入後よりクロック信号の計数を開
始してディジタル計数値を得る手段と、複数の基準電圧
を得る手段と、上記ディジタル計数値に応じて上記複数
−の基準電圧からレベルの順に一つの基準電圧を選択す
る手段と、上記負荷インピーダンスに対応する電圧と上
記選択された基準電圧との大小を比較して比較出力を発
生するコンパレータと、上記比較出力の変動直後の上記
ディジタル計数値を記憶保持する手段と、該記憶保持さ
れたディジタル計数値に応じて上記電力増幅器のバイア
スを制御する手段とを有することを特徴とする電力増幅
器のバイアス制御装置。In a power amplifier that has a muting switch that is installed between the output terminal and the load and cuts off the load for the required time from when the power is turned on, a DC signal is applied to the load side during the muting time to change the load impedance. means for generating a corresponding voltage; means for obtaining a digital count value by starting counting clock signals after power is turned on; means for obtaining a plurality of reference voltages; means for selecting one reference voltage in order from voltage to level; a comparator for generating a comparison output by comparing the magnitude of the voltage corresponding to the load impedance with the selected reference voltage; A bias control device for a power amplifier, comprising: means for storing and holding the digital count value; and means for controlling a bias of the power amplifier in accordance with the stored digital count value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17748282U JPS5981114U (en) | 1982-11-24 | 1982-11-24 | Power amplifier bias control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17748282U JPS5981114U (en) | 1982-11-24 | 1982-11-24 | Power amplifier bias control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5981114U true JPS5981114U (en) | 1984-06-01 |
Family
ID=30385572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17748282U Pending JPS5981114U (en) | 1982-11-24 | 1982-11-24 | Power amplifier bias control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5981114U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013131891A (en) * | 2011-12-21 | 2013-07-04 | Murata Mfg Co Ltd | Semiconductor device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122513A (en) * | 1980-03-03 | 1981-09-26 | Sharp Corp | Electric power supply system |
-
1982
- 1982-11-24 JP JP17748282U patent/JPS5981114U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122513A (en) * | 1980-03-03 | 1981-09-26 | Sharp Corp | Electric power supply system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013131891A (en) * | 2011-12-21 | 2013-07-04 | Murata Mfg Co Ltd | Semiconductor device |
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