JPS5445525A - Selection circuit for white balance - Google Patents

Selection circuit for white balance

Info

Publication number
JPS5445525A
JPS5445525A JP11245777A JP11245777A JPS5445525A JP S5445525 A JPS5445525 A JP S5445525A JP 11245777 A JP11245777 A JP 11245777A JP 11245777 A JP11245777 A JP 11245777A JP S5445525 A JPS5445525 A JP S5445525A
Authority
JP
Japan
Prior art keywords
control line
white balance
turned
voltage
selection
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
JP11245777A
Other languages
Japanese (ja)
Inventor
Tadayoshi Miyoshi
Shintaro Nakagaki
Ryoyu Takanashi
Koichiro Motoyama
Sumio Yokogawa
Kenichi Miyazaki
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP11245777A priority Critical patent/JPS5445525A/en
Publication of JPS5445525A publication Critical patent/JPS5445525A/en
Pending legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Abstract

PURPOSE: To perform the white balance selection with a simple circuit constitution, by feeding DC selection control signal by using a single control line.
CONSTITUTION: The selection control signal generator X supplies DC voltage B2, approximately B2/2.0 to the control line l with the selection switch SW. When 0 voltage is fed to the control line l, the control transistor Q1 is turned off and Q2 is turned on, and the voltage of B2/2 is given to the control line l, both Q1 and Q2 are turned on, and further, the voltage of B2 is given to the control line l, Q1 is turned on and Q2 is off. The ON-OFF operation of Q1 and Q2 changes the gain of the amplifying transistor Q for the video signal fed to the terminal 1, performing the white balance selective operation
COPYRIGHT: (C)1979,JPO&Japio
JP11245777A 1977-09-19 1977-09-19 Selection circuit for white balance Pending JPS5445525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11245777A JPS5445525A (en) 1977-09-19 1977-09-19 Selection circuit for white balance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11245777A JPS5445525A (en) 1977-09-19 1977-09-19 Selection circuit for white balance

Publications (1)

Publication Number Publication Date
JPS5445525A true JPS5445525A (en) 1979-04-10

Family

ID=14587108

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11245777A Pending JPS5445525A (en) 1977-09-19 1977-09-19 Selection circuit for white balance

Country Status (1)

Country Link
JP (1) JPS5445525A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60253935A (en) * 1984-05-31 1985-12-14 Matsushita Electric Ind Co Ltd Color camera
JPS61230591A (en) * 1985-04-05 1986-10-14 Victor Co Of Japan Ltd Automatic white balance circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60253935A (en) * 1984-05-31 1985-12-14 Matsushita Electric Ind Co Ltd Color camera
JPS61230591A (en) * 1985-04-05 1986-10-14 Victor Co Of Japan Ltd Automatic white balance circuit

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