JPS56160119A - Equalizing circuit of level ratio between video and voice - Google Patents

Equalizing circuit of level ratio between video and voice

Info

Publication number
JPS56160119A
JPS56160119A JP6279980A JP6279980A JPS56160119A JP S56160119 A JPS56160119 A JP S56160119A JP 6279980 A JP6279980 A JP 6279980A JP 6279980 A JP6279980 A JP 6279980A JP S56160119 A JPS56160119 A JP S56160119A
Authority
JP
Japan
Prior art keywords
component
voice
amplifier
double
level ratio
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
JP6279980A
Other languages
Japanese (ja)
Other versions
JPS6367395B2 (en
Inventor
Norio Taniguchi
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP6279980A priority Critical patent/JPS56160119A/en
Publication of JPS56160119A publication Critical patent/JPS56160119A/en
Publication of JPS6367395B2 publication Critical patent/JPS6367395B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Systems (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To ensure a simple equalization for the level ratio between a video signal and a voice signal, by extracting the double wave AC component out of the output of a variable tilt amplifier and comparing this component with the reference voltage to control the variable tilt amplifier. CONSTITUTION:When the image/voice double carrier signal is applied to an input terminal 10, the double wave differential AC component emerges at a resistance R1 end by giving a wave detection to the double waveheight frequency signal of a variable tilt amplifier 7 through a diode D1. The amplitude value of the double wave differential AC component varies by the level difference between a video signal and a voice signal. Based on the difference of the AC component, a capacitor C2 is charged. And the difference of AC component is converted into a DC component to be applied to a differential amplifier 6. In such way, the level ratio can be fixed at a certain value that is decided by a reference voltage 5 of the differential amplifier 6 for the video signal obtained through an output terminal 11 although some fluctuation is caused at the input terminal.
JP6279980A 1980-05-14 1980-05-14 Equalizing circuit of level ratio between video and voice Granted JPS56160119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6279980A JPS56160119A (en) 1980-05-14 1980-05-14 Equalizing circuit of level ratio between video and voice

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6279980A JPS56160119A (en) 1980-05-14 1980-05-14 Equalizing circuit of level ratio between video and voice

Publications (2)

Publication Number Publication Date
JPS56160119A true JPS56160119A (en) 1981-12-09
JPS6367395B2 JPS6367395B2 (en) 1988-12-26

Family

ID=13210748

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6279980A Granted JPS56160119A (en) 1980-05-14 1980-05-14 Equalizing circuit of level ratio between video and voice

Country Status (1)

Country Link
JP (1) JPS56160119A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05502939A (en) * 1989-10-04 1993-05-20 アガール・コーポレーション・インコーポレーテッド concentration measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05502939A (en) * 1989-10-04 1993-05-20 アガール・コーポレーション・インコーポレーテッド concentration measuring device

Also Published As

Publication number Publication date
JPS6367395B2 (en) 1988-12-26

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