JPS5778232A - Automatic gain control device - Google Patents
Automatic gain control deviceInfo
- Publication number
- JPS5778232A JPS5778232A JP15377180A JP15377180A JPS5778232A JP S5778232 A JPS5778232 A JP S5778232A JP 15377180 A JP15377180 A JP 15377180A JP 15377180 A JP15377180 A JP 15377180A JP S5778232 A JPS5778232 A JP S5778232A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- radio interference
- disturbing
- radio
- accordance
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To eliminate the radio interference effectively, by changing the detection level of a level detector in accordance with the differential frequency between a desired frequency and the frequency of disturbing radio waves causing the radio interference. CONSTITUTION:A desired receiving frequency is indicated to a channel selecting device, and disturbing radio waves which give the radio interference to the desired receiving frequency are searched through a level detector 40, and a series of operations where control signal for gain control are given in accordance with the search result is performed by a control device 17. The detection level of the detector 40 is changed to plural steps in accordance with the differential frequency between the desired receiving frequency and the frequency of disturbing radio waves causing the radio interference. Thus, conventional troubles, where the gain of an antenna input is controlled through disturbing radio waves are separated from the desired receiving frequency and do not reach the level of the radio interference, are eliminated to eliminate the radio interference effectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15377180A JPS5778232A (en) | 1980-11-04 | 1980-11-04 | Automatic gain control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15377180A JPS5778232A (en) | 1980-11-04 | 1980-11-04 | Automatic gain control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5778232A true JPS5778232A (en) | 1982-05-15 |
JPS6312407B2 JPS6312407B2 (en) | 1988-03-18 |
Family
ID=15569773
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15377180A Granted JPS5778232A (en) | 1980-11-04 | 1980-11-04 | Automatic gain control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5778232A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015170889A (en) * | 2014-03-05 | 2015-09-28 | パナソニック株式会社 | Radio communication equipment and disturbing wave detection method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2075426T3 (en) * | 1991-01-07 | 1995-10-01 | Michelin & Cie | MOTORCYCLE TIRES. |
-
1980
- 1980-11-04 JP JP15377180A patent/JPS5778232A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015170889A (en) * | 2014-03-05 | 2015-09-28 | パナソニック株式会社 | Radio communication equipment and disturbing wave detection method |
Also Published As
Publication number | Publication date |
---|---|
JPS6312407B2 (en) | 1988-03-18 |
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