CA1002606A - Muting circuit - Google Patents

Muting circuit

Info

Publication number
CA1002606A
CA1002606A CA171,497A CA171497A CA1002606A CA 1002606 A CA1002606 A CA 1002606A CA 171497 A CA171497 A CA 171497A CA 1002606 A CA1002606 A CA 1002606A
Authority
CA
Canada
Prior art keywords
muting circuit
muting
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.)
Expired
Application number
CA171,497A
Other languages
English (en)
Other versions
CA171497S (en
Inventor
Yasuo Itoh
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Application granted granted Critical
Publication of CA1002606A publication Critical patent/CA1002606A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D5/00—Circuits for demodulating amplitude-modulated or angle-modulated oscillations at will
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/04—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by counting or integrating cycles of oscillations
    • 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
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/006—Systems employing more than two channels, e.g. quadraphonic in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Amplifiers (AREA)
  • Stereophonic System (AREA)
  • Noise Elimination (AREA)
  • Television Signal Processing For Recording (AREA)
CA171,497A 1972-05-24 1973-05-16 Muting circuit Expired CA1002606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5149672A JPS5524320B2 (de) 1972-05-24 1972-05-24

Publications (1)

Publication Number Publication Date
CA1002606A true CA1002606A (en) 1976-12-28

Family

ID=12888567

Family Applications (1)

Application Number Title Priority Date Filing Date
CA171,497A Expired CA1002606A (en) 1972-05-24 1973-05-16 Muting circuit

Country Status (7)

Country Link
US (1) US3940698A (de)
JP (1) JPS5524320B2 (de)
CA (1) CA1002606A (de)
DE (1) DE2326159C3 (de)
DK (1) DK136129B (de)
GB (1) GB1430646A (de)
NL (1) NL7307183A (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL165027C (nl) * 1973-05-25 Matsushita Electric Ind Co Ltd Vierkanalig stereofonisch weergeefstelsel.
GB1531214A (en) * 1974-11-18 1978-11-08 Rca Corp Squelch circuit
US4071873A (en) * 1976-06-21 1978-01-31 Tokyo Shibaura Denki Kabushiki Kaisha Apparatus for detecting abnormal conditions of transmitted signals
JPS5947318B2 (ja) * 1977-03-25 1984-11-17 ヤマハ株式会社 電子楽器の楽音制御装置
US4220926A (en) * 1977-08-26 1980-09-02 Plessey Handel Und Investments Ag. Noise detector employing plural delay circuits
US4194230A (en) * 1978-09-11 1980-03-18 Southwest Utilities, Inc. Hazardous voltage protection circuitry
JPS5980806A (ja) * 1982-10-29 1984-05-10 日本鋼管株式会社 組立式架構
US4845379A (en) * 1988-07-05 1989-07-04 International Business Machines Corporation Sense circuit for detecting absence of a pulse train
US5675614A (en) * 1995-09-01 1997-10-07 Motorola, Inc. Digital squelch circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325738A (en) * 1964-02-17 1967-06-13 Avco Corp Signal to noise ratio controlled squelch circuit
US3662113A (en) * 1968-03-27 1972-05-09 Scott Inc H H Stereophonic demodulator apparatus and automatic monophonic-stereophonic switching circuit
CA938560A (en) * 1969-11-28 1973-12-18 Victor Company Of Japan System for recording and/or reproducing four channel signals on a record disc
US3628058A (en) * 1970-02-24 1971-12-14 Motorola Inc Integrated dual time constant squelch circuit
US3660765A (en) * 1970-04-13 1972-05-02 Motorola Inc Squelch circuit having short and long time constant filters for squelch tail elimination
US3843850A (en) * 1970-06-26 1974-10-22 Victor Co Ltd Four channel record reproducing apparatus with muting of speakers not used for stereo or monaural records

Also Published As

Publication number Publication date
DK136129C (de) 1978-01-16
DE2326159C3 (de) 1981-10-01
US3940698A (en) 1976-02-24
DK136129B (da) 1977-08-15
JPS4910002A (de) 1974-01-29
GB1430646A (en) 1976-03-31
DE2326159A1 (de) 1974-01-10
JPS5524320B2 (de) 1980-06-27
NL7307183A (de) 1973-11-27
DE2326159B2 (de) 1980-11-27

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