JPS5730429A - Automatic restoration system for automatic level adjuster - Google Patents
Automatic restoration system for automatic level adjusterInfo
- Publication number
- JPS5730429A JPS5730429A JP10473780A JP10473780A JPS5730429A JP S5730429 A JPS5730429 A JP S5730429A JP 10473780 A JP10473780 A JP 10473780A JP 10473780 A JP10473780 A JP 10473780A JP S5730429 A JPS5730429 A JP S5730429A
- Authority
- JP
- Japan
- Prior art keywords
- output
- pilot signal
- agc amplifier
- automatic
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/10—Control of transmission; Equalising by pilot signal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To automatically restore the automatic level regulator to an regulating region, when a pilot signal restores to a normal level, by providing a reversing transmission circuit to an output of an AGC amplifier and monitoring the output at mementary interruption of the pilot signal. CONSTITUTION:When an input level of a reception pilot signal lowers outside the permissible value, a comparator 6 detects it to activate a relay 7 and to switch a contact rl-3. Then, an AGC amplifier 1 is controlled with a variable resistive element by a voltage value stored in a storage circuit 8 to make the gain constant. With the output of the contact rl-1, a variable resistive element of a reversing transmission circuit 11 is controlled also with a variable resistive element of the AGC amplifier 1. The change of gain of the circuit 11 is made to the same amount at the AGC amplifier 1, but inversely proportional to said amount. When the input level of the pilot signal returns to normal state, this is detected at a level monitor circuit 10 to give an output to a comparator 6 and to restore the relay 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10473780A JPS5854687B2 (en) | 1980-07-30 | 1980-07-30 | Automatic return method of automatic level adjuster |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10473780A JPS5854687B2 (en) | 1980-07-30 | 1980-07-30 | Automatic return method of automatic level adjuster |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5730429A true JPS5730429A (en) | 1982-02-18 |
JPS5854687B2 JPS5854687B2 (en) | 1983-12-06 |
Family
ID=14388803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10473780A Expired JPS5854687B2 (en) | 1980-07-30 | 1980-07-30 | Automatic return method of automatic level adjuster |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5854687B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6057243U (en) * | 1983-09-28 | 1985-04-22 | ホーチキ株式会社 | signal receiving device |
JPH01249544A (en) * | 1988-03-31 | 1989-10-04 | Suzuki Motor Co Ltd | Rear view mirror device |
JPH02113612A (en) * | 1988-10-22 | 1990-04-25 | Nec Corp | Automatic gain control circuit |
FR2900291A1 (en) * | 2006-04-21 | 2007-10-26 | Alcatel Sa | DEVICE AND METHOD FOR AMPLIFYING RADIOCOMMUNICATION SIGNALS |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01154085A (en) * | 1987-12-10 | 1989-06-16 | Mitsubishi Electric Corp | Reflection-proof apparatus for vdt |
-
1980
- 1980-07-30 JP JP10473780A patent/JPS5854687B2/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6057243U (en) * | 1983-09-28 | 1985-04-22 | ホーチキ株式会社 | signal receiving device |
JPH01249544A (en) * | 1988-03-31 | 1989-10-04 | Suzuki Motor Co Ltd | Rear view mirror device |
JPH02113612A (en) * | 1988-10-22 | 1990-04-25 | Nec Corp | Automatic gain control circuit |
FR2900291A1 (en) * | 2006-04-21 | 2007-10-26 | Alcatel Sa | DEVICE AND METHOD FOR AMPLIFYING RADIOCOMMUNICATION SIGNALS |
WO2007122059A1 (en) * | 2006-04-21 | 2007-11-01 | Thales | Device and method for amplification of radiocommunication signals |
US7898326B2 (en) | 2006-04-21 | 2011-03-01 | Thales | Device and method for amplifying radiocommunication signals |
Also Published As
Publication number | Publication date |
---|---|
JPS5854687B2 (en) | 1983-12-06 |
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