JPS575479A - Luminance adjusting circuit - Google Patents

Luminance adjusting circuit

Info

Publication number
JPS575479A
JPS575479A JP8059580A JP8059580A JPS575479A JP S575479 A JPS575479 A JP S575479A JP 8059580 A JP8059580 A JP 8059580A JP 8059580 A JP8059580 A JP 8059580A JP S575479 A JPS575479 A JP S575479A
Authority
JP
Japan
Prior art keywords
trs
voltage
luminance
variance
variable resistor
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
JP8059580A
Other languages
Japanese (ja)
Inventor
Mitsuya Masuda
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 JP8059580A priority Critical patent/JPS575479A/en
Publication of JPS575479A publication Critical patent/JPS575479A/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
    • H04N5/14—Picture signal circuitry for video frequency region

Landscapes

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

Abstract

PURPOSE:To prevent the variance in a luminance set value due to variance of elements, by connecting a variable resistor in parallel with a sample holding capacitor for setting of luminance at vacant channel reception. CONSTITUTION:Normally, transistors TRs 6, 7 are conducted with a pedestal clamp pulse, and a resistance between the collector and the emitter is very small. On the other hand, at vacant channel reception, the TRs 6, 7 are turned off and TRs 15, 16 are operated. In this case, since negative feedback is given so as to equalize the emitter voltage of a TR4, to the base voltage of a TR10 and the base voltage of a TR11, the voltage at an output terminal 2 is set arbitrarily by adjusting a variable resistor in parallel connection with a sampling hold capacitor 9.
JP8059580A 1980-06-13 1980-06-13 Luminance adjusting circuit Pending JPS575479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8059580A JPS575479A (en) 1980-06-13 1980-06-13 Luminance adjusting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8059580A JPS575479A (en) 1980-06-13 1980-06-13 Luminance adjusting circuit

Publications (1)

Publication Number Publication Date
JPS575479A true JPS575479A (en) 1982-01-12

Family

ID=13722681

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8059580A Pending JPS575479A (en) 1980-06-13 1980-06-13 Luminance adjusting circuit

Country Status (1)

Country Link
JP (1) JPS575479A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139499U (en) * 1985-02-21 1986-08-29
JPH0630659A (en) * 1992-07-13 1994-02-08 Sekisui Jushi Co Ltd Shelf for net culture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139499U (en) * 1985-02-21 1986-08-29
JPH0630659A (en) * 1992-07-13 1994-02-08 Sekisui Jushi Co Ltd Shelf for net culture

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