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JPS57194612A - Monitoring circuit for nonbreak amplifying circuit - Google Patents

Monitoring circuit for nonbreak amplifying circuit

Info

Publication number
JPS57194612A
JPS57194612A JP7989381A JP7989381A JPS57194612A JP S57194612 A JPS57194612 A JP S57194612A JP 7989381 A JP7989381 A JP 7989381A JP 7989381 A JP7989381 A JP 7989381A JP S57194612 A JPS57194612 A JP S57194612A
Authority
JP
Japan
Prior art keywords
circuit
output
amplification part
amplification
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
Application number
JP7989381A
Other languages
Japanese (ja)
Inventor
Isao Sakuyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7989381A priority Critical patent/JPS57194612A/en
Publication of JPS57194612A publication Critical patent/JPS57194612A/en
Pending legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE: To improve the reliability of a transmission system by comparing and monitoring pilot signals extracted by respective pilot signal extracting circuits, and then turning off the power source of an amplification part when a fault of the amplification part due to an increase in gain is detected.
CONSTITUTION: The input sides of amplification parts 10 and 10' are coupled with an input coupling circuit 2, and the output sides are coupled with an output coupling circuit 3 respectively; and the circuits 2 and 3 are connected to an input circuit 1 and an output circuit 4, respectively, and part of the output of the circuit 4 is fed back to the circuit 1. Then, the level of the fault-side amplification part 10 is compared by a comparing circuit 6 with that of the normal-side amplification part 10', and the power-source turning-off circuit for the amplification part 10 is put in operation. Consequently, the output of the amplification part 10 is stopped.
COPYRIGHT: (C)1982,JPO&Japio
JP7989381A 1981-05-26 1981-05-26 Monitoring circuit for nonbreak amplifying circuit Pending JPS57194612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7989381A JPS57194612A (en) 1981-05-26 1981-05-26 Monitoring circuit for nonbreak amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7989381A JPS57194612A (en) 1981-05-26 1981-05-26 Monitoring circuit for nonbreak amplifying circuit

Publications (1)

Publication Number Publication Date
JPS57194612A true JPS57194612A (en) 1982-11-30

Family

ID=13702944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7989381A Pending JPS57194612A (en) 1981-05-26 1981-05-26 Monitoring circuit for nonbreak amplifying circuit

Country Status (1)

Country Link
JP (1) JPS57194612A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202715A (en) * 1983-04-30 1984-11-16 Shimadzu Corp High frequency power source device for icp analysis
JPS62225015A (en) * 1986-03-27 1987-10-03 Matsushita Electric Ind Co Ltd Power amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59202715A (en) * 1983-04-30 1984-11-16 Shimadzu Corp High frequency power source device for icp analysis
JPH057884B2 (en) * 1983-04-30 1993-01-29 Shimadzu Corp
JPS62225015A (en) * 1986-03-27 1987-10-03 Matsushita Electric Ind Co Ltd Power amplifier

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