JPS5642412A - Automatic gain control circuit - Google Patents

Automatic gain control circuit

Info

Publication number
JPS5642412A
JPS5642412A JP11905979A JP11905979A JPS5642412A JP S5642412 A JPS5642412 A JP S5642412A JP 11905979 A JP11905979 A JP 11905979A JP 11905979 A JP11905979 A JP 11905979A JP S5642412 A JPS5642412 A JP S5642412A
Authority
JP
Japan
Prior art keywords
circuit
output
pulse noise
amplifier
discriminating
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
JP11905979A
Other languages
Japanese (ja)
Inventor
Hiroshi Minami
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP11905979A priority Critical patent/JPS5642412A/en
Publication of JPS5642412A publication Critical patent/JPS5642412A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H03G3/3073—Circuits generating control signals when no carrier is present, or in SSB, CW or pulse receivers

Abstract

PURPOSE:To prevent the mixture of a pulse noise by discriminating the pulse noise in the output of a variable gain amplifier by a pulse noise discriminating circuit and then by resetting the hold value of a peak value detecting circuit with the output of the discriminating circuit. CONSTITUTION:The output of variable gain amplifier 9 is supplied to peak value detecting circuit 13 and a peak value detection voltage developed across capacitor 12 of detecting circuit 13 is applied to arithmetic circuit 15 of gain control circuit 10. The output voltage of this arithmetic circuit 15 is supplied to control circuit 9A of amplifier 9 to exercise control so that level of a received ultrasonic-wave pulse signal appearing at the output of amplifier 9 will be constant. Pulse noise discriminating circuit 17, provided at the output side of this amplifier 19, discriminates a pulse noise and applies its discrimination output to switch 16, connected to sample holding circuit 14 of circuit 10, via sample-holding inhibiting method 19 to reset the hold value of circuit 13, preventing the pulse noise from mixing.
JP11905979A 1979-09-14 1979-09-14 Automatic gain control circuit Pending JPS5642412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11905979A JPS5642412A (en) 1979-09-14 1979-09-14 Automatic gain control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11905979A JPS5642412A (en) 1979-09-14 1979-09-14 Automatic gain control circuit

Publications (1)

Publication Number Publication Date
JPS5642412A true JPS5642412A (en) 1981-04-20

Family

ID=14751878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11905979A Pending JPS5642412A (en) 1979-09-14 1979-09-14 Automatic gain control circuit

Country Status (1)

Country Link
JP (1) JPS5642412A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249505A (en) * 1984-05-18 1985-12-10 Mitsubishi Metal Corp High speed cutting tip coated with sintered carbide
JP2008296290A (en) * 2007-05-29 2008-12-11 Kyocera Corp Surface coated cutting tool
US8137795B2 (en) 2005-11-21 2012-03-20 Sumitomo Electric Hardmetal Corp. Indexable insert
US9878373B2 (en) * 2015-07-13 2018-01-30 Sumitomo Electric Hardmetal Corp. Surface-coated cutting tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249505A (en) * 1984-05-18 1985-12-10 Mitsubishi Metal Corp High speed cutting tip coated with sintered carbide
JPH0355245B2 (en) * 1984-05-18 1991-08-22
US8137795B2 (en) 2005-11-21 2012-03-20 Sumitomo Electric Hardmetal Corp. Indexable insert
JP2008296290A (en) * 2007-05-29 2008-12-11 Kyocera Corp Surface coated cutting tool
US9878373B2 (en) * 2015-07-13 2018-01-30 Sumitomo Electric Hardmetal Corp. Surface-coated cutting tool

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