JPS5730429A - Automatic restoration system for automatic level adjuster - Google Patents

Automatic restoration system for automatic level adjuster

Info

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
Application number
JP10473780A
Other languages
Japanese (ja)
Other versions
JPS5854687B2 (en
Inventor
Masao Takeda
Kyoji Shinohara
Yoshio Takekoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10473780A priority Critical patent/JPS5854687B2/en
Publication of JPS5730429A publication Critical patent/JPS5730429A/en
Publication of JPS5854687B2 publication Critical patent/JPS5854687B2/en
Expired legal-status Critical Current

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.
JP10473780A 1980-07-30 1980-07-30 Automatic return method of automatic level adjuster Expired JPS5854687B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01154085A (en) * 1987-12-10 1989-06-16 Mitsubishi Electric Corp Reflection-proof apparatus for vdt

Cited By (6)

* Cited by examiner, † Cited by third party
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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