JPH0268516U - - Google Patents
Info
- Publication number
- JPH0268516U JPH0268516U JP14711688U JP14711688U JPH0268516U JP H0268516 U JPH0268516 U JP H0268516U JP 14711688 U JP14711688 U JP 14711688U JP 14711688 U JP14711688 U JP 14711688U JP H0268516 U JPH0268516 U JP H0268516U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- variable attenuator
- circuit
- level determination
- 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)
Description
第１図は本考案の第１の実施例を示すブロツク
図、第２図は本考案の第２の実施例を示すブロツ
ク図、第３図は従来の自動利得制御装置の一例を
示すブロツク図である。
１……増幅器、２……連続可変減衰器、３……
振幅検波器、４……低域ろ波器、５……ステツプ
可変減衰器、６……レベル判定回路、７……バイ
アス切換回路、ＳＩＮ……入力信号、ＳＯＵＴ…
…出力信号、Ｖｃ，Ｖ′ｃ……制御電圧。
FIG. 1 is a block diagram showing a first embodiment of the present invention, FIG. 2 is a block diagram showing a second embodiment of the present invention, and FIG. 3 is a block diagram showing an example of a conventional automatic gain control device. It is. 1...Amplifier, 2...Continuously variable attenuator, 3...
Amplitude detector, 4...Low-pass filter, 5...Step variable attenuator, 6...Level judgment circuit, 7...Bias switching circuit, SIN...Input signal, SOUT...
...output signal, Vc, V'c...control voltage.
Claims (1)
に可変して減衰させるステツプ可変減衰器を有す
る増幅器と、この増幅器の出力信号を制御信号に
よつて前記段階の各間で連続可変して減衰させる
連続可変減衰器と、この連続可変減衰器の出力信
号のレベルを抽出するレベル抽出回路と、このレ
ベル抽出回路のレベル抽出信号からレベルを判定
して前記レベル判定信号を送出するレベル判定回
路と、前記レベル抽出信号と前記レベル判定信号
とによつて前記制御信号を発生する制御回路とを
有することを特徴とする自動利得制御装置。 An amplifier having a step variable attenuator that attenuates an input signal by varying it in stages according to an amplification level determination signal; and an output signal of this amplifier that continuously varies and attenuates the output signal between the stages according to a control signal. a continuously variable attenuator, a level extraction circuit that extracts the level of the output signal of the continuously variable attenuator, and a level determination circuit that determines the level from the level extraction signal of the level extraction circuit and sends out the level determination signal; An automatic gain control device comprising: a control circuit that generates the control signal based on the level extraction signal and the level determination signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14711688U JPH0268516U (en) | 1988-11-11 | 1988-11-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14711688U JPH0268516U (en) | 1988-11-11 | 1988-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0268516U true JPH0268516U (en) | 1990-05-24 |
Family
ID=31417229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14711688U Pending JPH0268516U (en) | 1988-11-11 | 1988-11-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0268516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005025056A1 (en) * | 2003-08-29 | 2005-03-17 | Sharp Kabushiki Kaisha | Automatic gain control amplification device, reception device, and radio communication device |
-
1988
- 1988-11-11 JP JP14711688U patent/JPH0268516U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005025056A1 (en) * | 2003-08-29 | 2005-03-17 | Sharp Kabushiki Kaisha | Automatic gain control amplification device, reception device, and radio communication device |