JPS5797280A - Picture elimination circuit - Google Patents

Picture elimination circuit

Info

Publication number
JPS5797280A
JPS5797280A JP17403680A JP17403680A JPS5797280A JP S5797280 A JPS5797280 A JP S5797280A JP 17403680 A JP17403680 A JP 17403680A JP 17403680 A JP17403680 A JP 17403680A JP S5797280 A JPS5797280 A JP S5797280A
Authority
JP
Japan
Prior art keywords
voltage
output
synchronizing separation
diode
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.)
Granted
Application number
JP17403680A
Other languages
Japanese (ja)
Other versions
JPH0130346B2 (en
Inventor
Toshitaka Yukimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17403680A priority Critical patent/JPS5797280A/en
Publication of JPS5797280A publication Critical patent/JPS5797280A/en
Publication of JPH0130346B2 publication Critical patent/JPH0130346B2/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

Abstract

PURPOSE:To completely eliminate a picture, by discriminating the presence of a reception signal with the presence of output of a synchronizing separation circuit, and connecting 0 voltage or power supply voltage to a luminance control circuit or a pedestal clamp circuit at non-signal. CONSTITUTION:For example, a potential at a connecting point B between a clamp diode D1 connected to the output side of synchronizing separation for one end and a parallel circuit of R3 and C2, can be set to about 1/2Vcc, by the diode D1 conductive with a pulsive synchronizing separation output voltage and the clamping C2 charged, at a normal reception state. On the other hand, the range of a luminance control voltage for pedestal clamping is set to 0-1/2Vcc, and the voltage at the point B is given to a luminance control transistor through a switching diode D2, then the diode D2 is non-conductive, allowing to give no effect on control operation. When no video signal is present, the output for synchronizing separation is also absent, the point B is at 0V and white raster is automatically eliminated. When the synchronizing separation output signal is negative, similar effect is obtained through the connection to the pedestal level.
JP17403680A 1980-12-09 1980-12-09 Picture elimination circuit Granted JPS5797280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17403680A JPS5797280A (en) 1980-12-09 1980-12-09 Picture elimination circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17403680A JPS5797280A (en) 1980-12-09 1980-12-09 Picture elimination circuit

Publications (2)

Publication Number Publication Date
JPS5797280A true JPS5797280A (en) 1982-06-16
JPH0130346B2 JPH0130346B2 (en) 1989-06-19

Family

ID=15971500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17403680A Granted JPS5797280A (en) 1980-12-09 1980-12-09 Picture elimination circuit

Country Status (1)

Country Link
JP (1) JPS5797280A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111369U (en) * 1983-01-17 1984-07-27 松下電器産業株式会社 television receiver
JPS60144368U (en) * 1984-03-05 1985-09-25 ソニー株式会社 satellite broadcast receiver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5394513U (en) * 1976-12-29 1978-08-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5394513U (en) * 1976-12-29 1978-08-01

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111369U (en) * 1983-01-17 1984-07-27 松下電器産業株式会社 television receiver
JPH0139019Y2 (en) * 1983-01-17 1989-11-21
JPS60144368U (en) * 1984-03-05 1985-09-25 ソニー株式会社 satellite broadcast receiver

Also Published As

Publication number Publication date
JPH0130346B2 (en) 1989-06-19

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