JP3976149B2 - ビデオ信号出力回路及びそれを用いた電子機器 - Google Patents
ビデオ信号出力回路及びそれを用いた電子機器 Download PDFInfo
- Publication number
- JP3976149B2 JP3976149B2 JP2004215062A JP2004215062A JP3976149B2 JP 3976149 B2 JP3976149 B2 JP 3976149B2 JP 2004215062 A JP2004215062 A JP 2004215062A JP 2004215062 A JP2004215062 A JP 2004215062A JP 3976149 B2 JP3976149 B2 JP 3976149B2
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal output
- low
- circuit
- pass filter
- 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.)
- Expired - Fee Related
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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
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
-
- 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
- H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
- H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Synchronizing For Television (AREA)
Description
2 カップリングコンデンサ
3 シンクチップクランプ回路
4 ローパスフィルタ
5 ダミー回路
6 出力ドライバ
IN 入力端子
OUT 出力端子
Claims (3)
- 入力されるビデオ信号のシンクチップレベルを一定の電圧に固定するシンクチップクランプ回路と、
シンクチップクランプ回路が出力するビデオ信号が入力され、所定の高周波成分を除去するローパスフィルタと、
シンクチップクランプ回路が出力するビデオ信号が入力され、ローパスフィルタが出力するビデオ信号と実質的に同じシンクチップレベルのビデオ信号を出力するダミー回路と、
ローパスフィルタが出力するビデオ信号が入力され、低い出力インピーダンスでビデオ信号を出力する出力ドライバと、
を備え、
前記シンクチップクランプ回路は、前記ダミー回路が出力するビデオ信号のシンクチップレベルが所定の基準電圧と等しくなるように制御することを特徴とするビデオ信号出力回路。 - 請求項1に記載のビデオ信号出力回路において、
前記ローパスフィルタは抵抗素子と容量素子を有し、
前記ダミー回路はローパスフィルタからその容量素子を取り除いて構成されることを特徴とするビデオ信号出力回路。 - 請求項1又は2に記載のビデオ信号出力回路と、
このビデオ信号出力回路からのビデオ信号を出力するビデオ信号出力端子と、
を備えることを特徴とする電子機器。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004215062A JP3976149B2 (ja) | 2004-07-23 | 2004-07-23 | ビデオ信号出力回路及びそれを用いた電子機器 |
US11/571,913 US7940335B2 (en) | 2004-07-23 | 2005-07-04 | Video signal output circuit and electronic device using the same |
CNB2005800195687A CN100454967C (zh) | 2004-07-23 | 2005-07-04 | 视频信号输出电路及使用该电路的电子设备 |
KR1020077004324A KR20070049173A (ko) | 2004-07-23 | 2005-07-04 | 비디오 신호 출력 회로 및 그것을 이용한 전자 기기 |
PCT/JP2005/012304 WO2006008945A1 (ja) | 2004-07-23 | 2005-07-04 | ビデオ信号出力回路及びそれを用いた電子機器 |
TW094125017A TW200608776A (en) | 2004-07-23 | 2005-07-22 | Video signal output circuit and electronic apparatus employing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004215062A JP3976149B2 (ja) | 2004-07-23 | 2004-07-23 | ビデオ信号出力回路及びそれを用いた電子機器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006041647A JP2006041647A (ja) | 2006-02-09 |
JP3976149B2 true JP3976149B2 (ja) | 2007-09-12 |
Family
ID=35785065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004215062A Expired - Fee Related JP3976149B2 (ja) | 2004-07-23 | 2004-07-23 | ビデオ信号出力回路及びそれを用いた電子機器 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7940335B2 (ja) |
JP (1) | JP3976149B2 (ja) |
KR (1) | KR20070049173A (ja) |
CN (1) | CN100454967C (ja) |
TW (1) | TW200608776A (ja) |
WO (1) | WO2006008945A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI335755B (en) * | 2007-04-12 | 2011-01-01 | Himax Tech Ltd | Device for separating synchronous signal and method thereof |
US8207759B2 (en) * | 2009-03-12 | 2012-06-26 | Fairchild Semiconductor Corporation | MIPI analog switch for automatic selection of multiple inputs based on clock voltages |
CN105163003B (zh) * | 2015-07-21 | 2018-08-31 | 无锡思泰迪半导体有限公司 | 一种含有视频信号预放大电路的集成滤波器模块 |
CN106878585B (zh) * | 2017-01-19 | 2024-02-06 | 杭州瑞盟科技股份有限公司 | 高清hd/全高清fhd可选择视频滤波驱动器 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3819859A (en) * | 1972-12-26 | 1974-06-25 | Bell Telephone Labor Inc | Horizontal sync detector and video clamp circuit |
US4215371A (en) * | 1978-12-21 | 1980-07-29 | Rockwell International Corporation | Front porch clamping circuit |
US4858015A (en) * | 1988-03-28 | 1989-08-15 | Thomson Consumer Electronics, Inc. | Video display driver coupling circuit |
JPH0725312B2 (ja) | 1988-08-18 | 1995-03-22 | マツダ株式会社 | 電動式パワーステアリング装置 |
JPH0253666U (ja) * | 1988-10-08 | 1990-04-18 | ||
US5486869A (en) * | 1992-02-18 | 1996-01-23 | Cooper; J. Carl | Synchronizing signal separating apparatus and method |
KR950011658B1 (ko) * | 1992-04-22 | 1995-10-07 | 삼성전자주식회사 | 자동이득조정회로 |
JPH06225181A (ja) | 1993-01-21 | 1994-08-12 | Sharp Corp | ビデオ出力回路 |
JPH08172548A (ja) | 1994-12-19 | 1996-07-02 | Sony Corp | クランプ回路 |
JP3278546B2 (ja) * | 1995-04-28 | 2002-04-30 | 日本電気エンジニアリング株式会社 | 同期信号発生回路 |
US7050098B2 (en) * | 2001-03-29 | 2006-05-23 | Canon Kabushiki Kaisha | Signal processing apparatus and method, and image sensing apparatus having a plurality of image sensing regions per image frame |
-
2004
- 2004-07-23 JP JP2004215062A patent/JP3976149B2/ja not_active Expired - Fee Related
-
2005
- 2005-07-04 WO PCT/JP2005/012304 patent/WO2006008945A1/ja active Application Filing
- 2005-07-04 CN CNB2005800195687A patent/CN100454967C/zh not_active Expired - Fee Related
- 2005-07-04 KR KR1020077004324A patent/KR20070049173A/ko not_active Application Discontinuation
- 2005-07-04 US US11/571,913 patent/US7940335B2/en active Active
- 2005-07-22 TW TW094125017A patent/TW200608776A/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN100454967C (zh) | 2009-01-21 |
KR20070049173A (ko) | 2007-05-10 |
US7940335B2 (en) | 2011-05-10 |
TWI343744B (ja) | 2011-06-11 |
WO2006008945A1 (ja) | 2006-01-26 |
TW200608776A (en) | 2006-03-01 |
US20080002057A1 (en) | 2008-01-03 |
CN1969538A (zh) | 2007-05-23 |
JP2006041647A (ja) | 2006-02-09 |
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