JPS57129088A - Video outputting circuit - Google Patents

Video outputting circuit

Info

Publication number
JPS57129088A
JPS57129088A JP56012982A JP1298281A JPS57129088A JP S57129088 A JPS57129088 A JP S57129088A JP 56012982 A JP56012982 A JP 56012982A JP 1298281 A JP1298281 A JP 1298281A JP S57129088 A JPS57129088 A JP S57129088A
Authority
JP
Japan
Prior art keywords
cut
voltage
varied
resistance
video output
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
JP56012982A
Other languages
Japanese (ja)
Other versions
JPS6142473B2 (en
Inventor
Koichi Sunada
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP56012982A priority Critical patent/JPS57129088A/en
Publication of JPS57129088A publication Critical patent/JPS57129088A/en
Publication of JPS6142473B2 publication Critical patent/JPS6142473B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/648—Video amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE:To equalize the frequency characteristics of a video output transistor of each color, by compensating the frequency characteristics of each video output transistors, by an output of a detecting circuit for detecting the cut-off voltage of a color cathode ray tube. CONSTITUTION:Cut-off voltage is detected by operations of a cut-off voltage detecting resistance Ra1 and a cut-off adjusting variable resistance VR12. In accordance with sliding terminal voltage of the cut-off adjusting variable resistance VR12, an emitter current of a video output transistor Q12 is varied, and the collector potential is varied. As a result, an equivalent resistance value of a circuit constituted of a frequency characteristic compensating transistor TR1 and a feedback resistance Rb1 is varied.
JP56012982A 1981-02-02 1981-02-02 Video outputting circuit Granted JPS57129088A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56012982A JPS57129088A (en) 1981-02-02 1981-02-02 Video outputting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56012982A JPS57129088A (en) 1981-02-02 1981-02-02 Video outputting circuit

Publications (2)

Publication Number Publication Date
JPS57129088A true JPS57129088A (en) 1982-08-10
JPS6142473B2 JPS6142473B2 (en) 1986-09-20

Family

ID=11820405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56012982A Granted JPS57129088A (en) 1981-02-02 1981-02-02 Video outputting circuit

Country Status (1)

Country Link
JP (1) JPS57129088A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005501486A (en) * 2001-08-23 2005-01-13 トムソン　ライセンシング　ソシエテ　アノニム Adaptive bandwidth control of picture tube amplifiers.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005501486A (en) * 2001-08-23 2005-01-13 トムソン　ライセンシング　ソシエテ　アノニム Adaptive bandwidth control of picture tube amplifiers.

Also Published As

Publication number Publication date
JPS6142473B2 (en) 1986-09-20

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