JPS58104013U - AGC device - Google Patents
AGC deviceInfo
- Publication number
- JPS58104013U JPS58104013U JP111882U JP111882U JPS58104013U JP S58104013 U JPS58104013 U JP S58104013U JP 111882 U JP111882 U JP 111882U JP 111882 U JP111882 U JP 111882U JP S58104013 U JPS58104013 U JP S58104013U
- Authority
- JP
- Japan
- Prior art keywords
- switch
- output
- receives
- switches
- fixed attenuator
- 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
Landscapes
- Control Of Amplification And Gain Control (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
第１図は従来のＡＧＣ装置を説明するためのブ、ロック
図、第２図は第１図による相対入力レベル対ＡＧＣ電圧
特性を示す図、第３図はこの考案によるＡＧＣ装置の実
施例を示すブロック図、第４図は第３図の構成による相
対入カレベル対ＡＧＣ電圧特性を示す図である。
図中、１は可変利得増幅器、２は検波器、３は利得制御
回路、４ａ、４ｂ、４ｃはそれぞれ第１、第２、第３の
スイッチ、５は固定減衰器、６はコ“ンパレータ、７は
スイッチ駆動回路である。なお、図中、−同一あるいは
相当部分には同一符号を付して示しである。Fig. 1 is a block diagram for explaining a conventional AGC device, Fig. 2 is a diagram showing the relative input level versus AGC voltage characteristics according to Fig. 1, and Fig. 3 is an example of the AGC device according to this invention. The block diagram shown in FIG. 4 is a diagram showing the relative input level versus AGC voltage characteristic in the configuration of FIG. 3. In the figure, 1 is a variable gain amplifier, 2 is a detector, 3 is a gain control circuit, 4a, 4b, and 4c are first, second, and third switches, respectively, 5 is a fixed attenuator, 6 is a comparator, Reference numeral 7 denotes a switch drive circuit. In the figure, the same or corresponding parts are indicated by the same reference numerals.
Claims (1)
接点出力の一方を受ける固定減衰器と、この固定減衰器
の出力と上記第１のスイッチの他方の接点出力とを受け
て切換える第２のスイッチと、その第２のスイッチの出
力を受けて増幅する可変利得増幅器と、この増幅器の出
力を検波する検波器と、この検波器の出力を受は上記可
変利得増幅器の利得を制御するＡＧＣ電圧゛に変換する
利得制御器と、しきい値電圧Ｖｈ、 Ｖｌを切換える第
３のスイッチと、この第３のスイッチの出力と利得制御
器の出力であるＡＧＣ電圧を受けて比較するコンパレー
タと、このコンパレータの出力を受けて上記の第１、第
２、及び第３のスイッチを駆動させるスイッチ駆動回路
とから構成され、入力信号レベルに応じて上記固定減衰
器番上記第１、第２のスイッチで接続又は切離するよう
にしたことを特徴とするＡＧＣ装置。A first switch that switches an input signal, a fixed attenuator that receives one of the contact outputs of the switch, and a second switch that receives and switches the output of the fixed attenuator and the other contact output of the first switch. , a variable gain amplifier that receives and amplifies the output of the second switch, a detector that detects the output of this amplifier, and an AGC voltage that receives the output of this detector and controls the gain of the variable gain amplifier. a third switch that switches the threshold voltages Vh and Vl, a comparator that receives and compares the output of the third switch and the AGC voltage that is the output of the gain controller; and a switch drive circuit that receives the output of the switch and drives the first, second, and third switches, and connects the fixed attenuator number with the first and second switches according to the input signal level. Or an AGC device characterized by being separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP111882U JPS58104013U (en) | 1982-01-08 | 1982-01-08 | AGC device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP111882U JPS58104013U (en) | 1982-01-08 | 1982-01-08 | AGC device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58104013U true JPS58104013U (en) | 1983-07-15 |
Family
ID=30014156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP111882U Pending JPS58104013U (en) | 1982-01-08 | 1982-01-08 | AGC device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58104013U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0242805A (en) * | 1988-08-02 | 1990-02-13 | Rohm Co Ltd | Amplifying circuit |
| JPH02301209A (en) * | 1989-05-15 | 1990-12-13 | Nec Corp | Automatic gain control amplifier |
| JP2013115634A (en) * | 2011-11-29 | 2013-06-10 | Yamaha Corp | Level adjustment device and level adjustment program |
-
1982
- 1982-01-08 JP JP111882U patent/JPS58104013U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0242805A (en) * | 1988-08-02 | 1990-02-13 | Rohm Co Ltd | Amplifying circuit |
| JPH02301209A (en) * | 1989-05-15 | 1990-12-13 | Nec Corp | Automatic gain control amplifier |
| JP2013115634A (en) * | 2011-11-29 | 2013-06-10 | Yamaha Corp | Level adjustment device and level adjustment program |
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