JPS5679509A - Automatic gain control circuit - Google Patents
Automatic gain control circuitInfo
- Publication number
- JPS5679509A JPS5679509A JP15640779A JP15640779A JPS5679509A JP S5679509 A JPS5679509 A JP S5679509A JP 15640779 A JP15640779 A JP 15640779A JP 15640779 A JP15640779 A JP 15640779A JP S5679509 A JPS5679509 A JP S5679509A
- Authority
- JP
- Japan
- Prior art keywords
- multiplier
- output
- gain control
- amplifier
- input
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
PURPOSE:To form an AGC by an A/D converter with less bit number, by two stages of gain control at the amplifier and the change of the multiplier at the multiplier. CONSTITUTION:The overall gain of an AGC circuit is expressed in the floating decimal point form of f.2<e>. That is, the obtained gains are 2<e> at an amplifier 16 and (f) at a multiplier 18. The input x(t) is 2<e> times at the amplifier 16 and is fed to an A/D converter 17 as 2<e>.x(t), where the signal is converted from analog into digital signal, and the result is input to a multiplier 18 as a multiplicand. This input 2<e>. x(t) is (f) times at the multiplier 18 and the output is made as y=f.2<e>.x(t). This output (y) is a constant signal by the AGC circuit. That is, either one or both of (f) and (e) are corrected with the control output obtained through the detection of the output (y).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15640779A JPS5679509A (en) | 1979-12-04 | 1979-12-04 | Automatic gain control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15640779A JPS5679509A (en) | 1979-12-04 | 1979-12-04 | Automatic gain control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5679509A true JPS5679509A (en) | 1981-06-30 |
Family
ID=15627062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15640779A Pending JPS5679509A (en) | 1979-12-04 | 1979-12-04 | Automatic gain control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5679509A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178017A (en) * | 1986-01-31 | 1987-08-05 | Sony Corp | Gain control circuit |
| WO2001058021A1 (en) * | 2000-01-31 | 2001-08-09 | Toa Corporation | Digital communication system |
| WO2002041495A1 (en) * | 2000-11-16 | 2002-05-23 | Sony Corporation | Analog front-end circuit |
| JP2006216188A (en) * | 2005-02-04 | 2006-08-17 | Canon Inc | Electronic equipment and control method therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034772A (en) * | 1973-08-01 | 1975-04-03 |
-
1979
- 1979-12-04 JP JP15640779A patent/JPS5679509A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034772A (en) * | 1973-08-01 | 1975-04-03 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62178017A (en) * | 1986-01-31 | 1987-08-05 | Sony Corp | Gain control circuit |
| WO2001058021A1 (en) * | 2000-01-31 | 2001-08-09 | Toa Corporation | Digital communication system |
| US7035395B2 (en) | 2000-01-31 | 2006-04-25 | Toa Corporation | Digital communication system |
| WO2002041495A1 (en) * | 2000-11-16 | 2002-05-23 | Sony Corporation | Analog front-end circuit |
| US7173987B2 (en) | 2000-11-16 | 2007-02-06 | Sony Corporation | Analog front end circuit |
| JP2006216188A (en) * | 2005-02-04 | 2006-08-17 | Canon Inc | Electronic equipment and control method therefor |
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