JPS5693490A - Sound intermediate frequency signal detecting circuit - Google Patents

Sound intermediate frequency signal detecting circuit

Info

Publication number
JPS5693490A
JPS5693490A JP17163479A JP17163479A JPS5693490A JP S5693490 A JPS5693490 A JP S5693490A JP 17163479 A JP17163479 A JP 17163479A JP 17163479 A JP17163479 A JP 17163479A JP S5693490 A JPS5693490 A JP S5693490A
Authority
JP
Japan
Prior art keywords
sound
frequency signal
intermediate frequency
carrier wave
sound intermediate
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
JP17163479A
Other languages
Japanese (ja)
Inventor
Yutaka Ogiwara
Hiroto Yasumura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP17163479A priority Critical patent/JPS5693490A/en
Publication of JPS5693490A publication Critical patent/JPS5693490A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/62—Intercarrier circuits, i.e. heterodyning sound and vision carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE:To prevent generation of buzz sound and beat sound, by multiplying the video carrier wave and the sound carrier wave to obtain a sound intermediate frequency signal. CONSTITUTION:Band filter 23 and limiter 29 are used to generate video carrier wave X1 of a fixed amplitude from the output of tuner 22. Video carrier wave X1 and sound carrier wave X2 which is taken out from the tuner output similarly by band filter 26 are multiplied to obtain sound intermediate frequency signal S3 of 4.5MHz which is differential components between both carrier waves.
JP17163479A 1979-12-27 1979-12-27 Sound intermediate frequency signal detecting circuit Pending JPS5693490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17163479A JPS5693490A (en) 1979-12-27 1979-12-27 Sound intermediate frequency signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17163479A JPS5693490A (en) 1979-12-27 1979-12-27 Sound intermediate frequency signal detecting circuit

Publications (1)

Publication Number Publication Date
JPS5693490A true JPS5693490A (en) 1981-07-29

Family

ID=15926820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17163479A Pending JPS5693490A (en) 1979-12-27 1979-12-27 Sound intermediate frequency signal detecting circuit

Country Status (1)

Country Link
JP (1) JPS5693490A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532502A1 (en) * 1982-08-30 1984-03-02 Rca Corp TELEVISION SOUND DETECTION DEVICE WITH FREQUENCY TRANSLATION PHASE LOCKED LOOP
US4470070A (en) * 1982-08-30 1984-09-04 Rca Corporation Frequency translation phase-locked loop television sound detection system
US4470071A (en) * 1982-08-30 1984-09-04 Rca Corporation Television sound detection system using a frequency translation phase-locked loop
US4513323A (en) * 1982-11-30 1985-04-23 Rca Corporation Buzz reduction for intercarrier type television sound detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532502A1 (en) * 1982-08-30 1984-03-02 Rca Corp TELEVISION SOUND DETECTION DEVICE WITH FREQUENCY TRANSLATION PHASE LOCKED LOOP
US4470070A (en) * 1982-08-30 1984-09-04 Rca Corporation Frequency translation phase-locked loop television sound detection system
US4470071A (en) * 1982-08-30 1984-09-04 Rca Corporation Television sound detection system using a frequency translation phase-locked loop
US4513323A (en) * 1982-11-30 1985-04-23 Rca Corporation Buzz reduction for intercarrier type television sound detection

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