KR100207713B1 - 아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 - Google Patents
아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 Download PDFInfo
- Publication number
- KR100207713B1 KR100207713B1 KR1019970001310A KR19970001310A KR100207713B1 KR 100207713 B1 KR100207713 B1 KR 100207713B1 KR 1019970001310 A KR1019970001310 A KR 1019970001310A KR 19970001310 A KR19970001310 A KR 19970001310A KR 100207713 B1 KR100207713 B1 KR 100207713B1
- Authority
- KR
- South Korea
- Prior art keywords
- agc
- voltage
- constant
- converter
- inputting
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
-
- 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
- H04N5/52—Automatic gain control
- H04N5/53—Keyed automatic gain control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Control Of Amplification And Gain Control (AREA)
- Television Receiver Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
Description
Claims (4)
- AGC 회로에 있어서, 수평 동기 신호 및 수직 동기 신호를 입력하여 클램프 펄스와 AGC 게이트 펄스를 출력하는 펄스 발생기, 상기 클램프 펄스를 입력하여 비디오 신호의 싱크 팁을 기준 전압에 클램프하는 클램프부, 상기 기준 전압과 Top 전압 사이에서 클램프된 비디오 신호를 디지탈 신호로 변환하여 AD 변환된 데이타를 출력하는 AD 변환부, 상기 AGC 게이트 펄스를 입력하여 상기 AD 변환된 데이타로부터 AGC 상수를 결정하는 AGC 상수 결정부, 상기 AGC 상수를 입력하여 상기 AGC 상수에 상응하는 PWM 제어 신호를 출력하는 PWM 제어기 및 상기 PWM 제어 신호를 적분하여 상기 AD 변환부의 Top 전압인 직류 전압으로 변환하여 상기 AD 변환부로 출력하는 저역 필터를 포함하는 아날로그-디지탈 변환기의 Top 전압을 이용한 AGC 회로.
- 제 1항에 있어서, 상기 AGC 상수 결정부는 상기 AGC 게이트 펄스가 입력되는 시점에서부터 다음 AGC 게이트 펄스가 입력될 때까지 상기 AD 변환된 데이타로부터 N 개의 샘플을 추출하여 그에 대한 평균값 M을 출력하는 N 샘플 평균치부, 표준 싱크 팁 상수값 K를 구하여 그 역수 1/K를 출력하는 1/K 값 설정부 및 상기 평균값 M과 1/K을 곱하여 AGC 상수인 M/K를 상기 PWM 제어기로 출력하는 승산기로 구성되는 것을 특징으로 하는 아날로그-디지탈 변환기의 Top 전압을 이용한 AGC 회로.
- 제 1항에 있어서, 상기 PWM 제어기는 상기 AGC 상수값이 1보다 클 경우에 상기 AD 변환부의 게인을 줄이기 위해 하이 구간이 늘어난 PWM 제어 신호를 출력하는 것을 특징으로 하는 아날로그-디지탈 변환기의 Top 전압을 이용한 AGC 회로.
- 제 1항에 있어서, 상기 PWM 제어기는 상기 AGC 상수값이 1보다 작을 경우에 상기 AD 변환부의 게인을 늘리기 위해 로우 구간이 늘어난 PWM 제어 신호를 출력하는 것을 특징으로 하는 아날로그-디지탈 변환기의 Top 전압을 이용한 AGC 회로.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970001310A KR100207713B1 (ko) | 1997-01-17 | 1997-01-17 | 아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 |
| EP98300226A EP0854646B1 (en) | 1997-01-17 | 1998-01-14 | Digital automatic gain control (AGC) circuit |
| DE69831621T DE69831621T2 (de) | 1997-01-17 | 1998-01-14 | Digitale automatische Verstärkungsregelungsschaltung |
| JP10007076A JPH10215422A (ja) | 1997-01-17 | 1998-01-16 | デジタルagc回路 |
| US09/008,061 US6195133B1 (en) | 1997-01-17 | 1998-01-16 | Digital automatic gain control (AGC) circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970001310A KR100207713B1 (ko) | 1997-01-17 | 1997-01-17 | 아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980066009A KR19980066009A (ko) | 1998-10-15 |
| KR100207713B1 true KR100207713B1 (ko) | 1999-07-15 |
Family
ID=19494947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019970001310A Expired - Fee Related KR100207713B1 (ko) | 1997-01-17 | 1997-01-17 | 아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6195133B1 (ko) |
| EP (1) | EP0854646B1 (ko) |
| JP (1) | JPH10215422A (ko) |
| KR (1) | KR100207713B1 (ko) |
| DE (1) | DE69831621T2 (ko) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999045703A1 (en) * | 1998-03-06 | 1999-09-10 | Matsushita Electric Industrial Co., Ltd. | Automatic luminance adjustment device and method |
| US6369857B1 (en) * | 1999-05-13 | 2002-04-09 | Sarnoff Corporation | Receiver for analog and digital television signals |
| DE19933199C1 (de) * | 1999-07-15 | 2001-01-25 | Daimler Chrysler Ag | Verfahren zur Erfassung von Helligkeitssignalen einer Mehrzahl lichtempfindlicher Sensorelemente |
| MXPA03004600A (es) * | 2000-11-27 | 2003-09-04 | Thomson Licensing Sa | Fijador de portal trasero. |
| US7277510B1 (en) | 2001-05-16 | 2007-10-02 | Maxim Integrated Products, Inc. | Adaptation algorithm based on signal statistics for automatic gain control |
| US7019930B1 (en) | 2002-09-16 | 2006-03-28 | Storage Technology Corporation | Digital filtering and digital automatic gain control for a variable speed read channel |
| JP4351857B2 (ja) * | 2003-04-07 | 2009-10-28 | 新日本無線株式会社 | 外部出力映像信号処理装置 |
| TWI271102B (en) * | 2005-03-04 | 2007-01-11 | Chip Advanced Technology Inc | Method for video signal process and method for signal processing apparatus calibration |
| US7265626B2 (en) * | 2005-12-20 | 2007-09-04 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Fast-setting digital automatic gain control |
| JP4977573B2 (ja) * | 2007-10-11 | 2012-07-18 | オンセミコンダクター・トレーディング・リミテッド | 映像信号処理装置におけるオートゲインコントロール回路 |
| CN101911460B (zh) * | 2007-12-25 | 2013-04-17 | 株式会社村田制作所 | 处理器及开关电源装置 |
| US8238571B2 (en) * | 2008-07-21 | 2012-08-07 | Nissan North America, Inc. | Automatic input sensitivity selector for auxiliary devices |
| US8760538B2 (en) | 2011-01-21 | 2014-06-24 | Exelis, Inc. | Adaptive gain control image processing system and method |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5210625B2 (ko) | 1971-11-10 | 1977-03-25 | ||
| JPH0620280B2 (ja) * | 1981-07-22 | 1994-03-16 | 日本電気株式会社 | テレビジョン信号用振幅検出回路 |
| JPS6075112A (ja) | 1983-09-30 | 1985-04-27 | Sony Corp | 映像信号のagc回路 |
| US4680633A (en) * | 1985-04-24 | 1987-07-14 | Third Domain, Inc. | Circuit and method for producing accurate dc restored video waveform, horizontal sync pulses, and vertical sync pulses |
| US4628362A (en) * | 1985-05-02 | 1986-12-09 | American Dynamics Corporation | Combined video AGC and digitizing circuit |
| JP2553534B2 (ja) * | 1986-12-26 | 1996-11-13 | 松下電器産業株式会社 | テレビジヨン映像信号制御装置 |
| FR2611337B1 (fr) * | 1987-02-20 | 1989-05-26 | Thomson Semiconducteurs | Dispositif de commande automatique de gain de signaux video |
| US4827191A (en) * | 1987-09-08 | 1989-05-02 | Motorola, Inc. | Adaptive range/DC restoration circuit or use with analog to digital convertors |
| JP2678006B2 (ja) * | 1988-03-04 | 1997-11-17 | 松下電器産業株式会社 | 自動利得制御装置 |
| US4989074A (en) * | 1988-09-27 | 1991-01-29 | Matsushita Electric Industrial Co., Ltd. | Digital automatic gain control apparatus |
| JP2519566B2 (ja) | 1990-03-16 | 1996-07-31 | シャープ株式会社 | ディジタルagc回路 |
| JPH0420178A (ja) | 1990-05-15 | 1992-01-23 | Matsushita Electric Ind Co Ltd | 映像信号処理装置 |
| JPH0564102A (ja) | 1991-08-31 | 1993-03-12 | Nec Eng Ltd | 利得調整装置 |
| JPH05219406A (ja) | 1992-02-04 | 1993-08-27 | Sony Corp | ビデオ信号のレベル調整回路 |
| US5379075A (en) * | 1992-02-04 | 1995-01-03 | Sony Corporation | Video signal AGC circuit for adjusting the sync level of a video signal |
| KR950011658B1 (ko) * | 1992-04-22 | 1995-10-07 | 삼성전자주식회사 | 자동이득조정회로 |
| JPH06204767A (ja) * | 1992-12-28 | 1994-07-22 | Matsushita Electric Ind Co Ltd | 自動利得制御回路 |
| JPH0799618A (ja) * | 1993-02-02 | 1995-04-11 | Philips Electron Nv | 自動利得制御ビデオ装置 |
| KR100286006B1 (ko) * | 1993-03-31 | 2001-04-16 | 윤종용 | 자동이득 조절장치 |
| WO1996007927A2 (en) * | 1994-09-01 | 1996-03-14 | Philips Electronics N.V. | Transconductance amplifier having a digitally variable transconductance as well as a variable gain stage and an automatic gain control circuit comprising such a variable gain stage |
| CA2157986A1 (en) * | 1995-09-11 | 1997-03-12 | Gennum Corporation | Sync separator and video signal detector circuits |
| JP3316351B2 (ja) * | 1995-09-27 | 2002-08-19 | シャープ株式会社 | Agc装置 |
-
1997
- 1997-01-17 KR KR1019970001310A patent/KR100207713B1/ko not_active Expired - Fee Related
-
1998
- 1998-01-14 EP EP98300226A patent/EP0854646B1/en not_active Expired - Lifetime
- 1998-01-14 DE DE69831621T patent/DE69831621T2/de not_active Expired - Lifetime
- 1998-01-16 JP JP10007076A patent/JPH10215422A/ja active Pending
- 1998-01-16 US US09/008,061 patent/US6195133B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0854646B1 (en) | 2005-09-21 |
| DE69831621T2 (de) | 2006-05-11 |
| JPH10215422A (ja) | 1998-08-11 |
| US6195133B1 (en) | 2001-02-27 |
| EP0854646A2 (en) | 1998-07-22 |
| EP0854646A3 (en) | 1999-10-20 |
| KR19980066009A (ko) | 1998-10-15 |
| DE69831621D1 (de) | 2005-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100207713B1 (ko) | 아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 | |
| KR930002145B1 (ko) | 신호 처리 장치 | |
| CN1032289C (zh) | 图象质量自动补偿法和设备 | |
| JP2541555B2 (ja) | ビデオ信号の非直線伝送方法および回路装置 | |
| KR970058039A (ko) | 다중 화상 입력 클램프 배열 | |
| US5528241A (en) | Digital-to-analog converter | |
| KR920007607B1 (ko) | 디지탈 텔레비젼 수상기에 있어서 콘트라스트 조정회로 | |
| US5345279A (en) | Image signal processing apparatus with analog to digital image conversion | |
| JPH11289505A (ja) | 映像信号処理回路 | |
| JPH02203677A (ja) | 撮像装置 | |
| EP1071281B1 (en) | Automatic luminance adjustment device and method | |
| JPH01218177A (ja) | 撮像信号処理回路 | |
| JPH07203485A (ja) | 映像信号用a/d変換装置 | |
| JP2956431B2 (ja) | 同期信号すげ替え装置 | |
| KR100213011B1 (ko) | 직류레벨 재생회로 | |
| KR100634013B1 (ko) | 복수 개의 영상신호 채널 이득조절 장치 및 방법. | |
| JPS6211392A (ja) | キ−イング信号発生回路 | |
| KR100230272B1 (ko) | 자동 이득 제어회로 | |
| GB2264025A (en) | Circuit arrangement for adaptive white-compression of colour video signals | |
| JP3006291B2 (ja) | テレビジョンカメラのアナログ/ディジタル変換装置 | |
| KR20020015843A (ko) | 자동이득조정 기능이 추가된 휘도 신호 조절부 | |
| US6031476A (en) | Digital to analog converter with current supply for suppressing current during a synchronization signal | |
| JPH01112887A (ja) | 撮像装置 | |
| JP2005175549A (ja) | 映像信号処理装置 | |
| KR19980040684A (ko) | 비디오 디코더의 자동 이득 조절기 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| PA0109 | Patent application |
St.27 status event code: A-0-1-A10-A12-nap-PA0109 |
|
| PA0201 | Request for examination |
St.27 status event code: A-1-2-D10-D11-exm-PA0201 |
|
| R17-X000 | Change to representative recorded |
St.27 status event code: A-3-3-R10-R17-oth-X000 |
|
| PG1501 | Laying open of application |
St.27 status event code: A-1-1-Q10-Q12-nap-PG1501 |
|
| R18-X000 | Changes to party contact information recorded |
St.27 status event code: A-3-3-R10-R18-oth-X000 |
|
| PN2301 | Change of applicant |
St.27 status event code: A-3-3-R10-R13-asn-PN2301 St.27 status event code: A-3-3-R10-R11-asn-PN2301 |
|
| E701 | Decision to grant or registration of patent right | ||
| PE0701 | Decision of registration |
St.27 status event code: A-1-2-D10-D22-exm-PE0701 |
|
| GRNT | Written decision to grant | ||
| PR0701 | Registration of establishment |
St.27 status event code: A-2-4-F10-F11-exm-PR0701 |
|
| PR1002 | Payment of registration fee |
St.27 status event code: A-2-2-U10-U11-oth-PR1002 Fee payment year number: 1 |
|
| PG1601 | Publication of registration |
St.27 status event code: A-4-4-Q10-Q13-nap-PG1601 |
|
| PN2301 | Change of applicant |
St.27 status event code: A-5-5-R10-R13-asn-PN2301 St.27 status event code: A-5-5-R10-R11-asn-PN2301 |
|
| R18-X000 | Changes to party contact information recorded |
St.27 status event code: A-5-5-R10-R18-oth-X000 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 4 |
|
| PN2301 | Change of applicant |
St.27 status event code: A-5-5-R10-R13-asn-PN2301 St.27 status event code: A-5-5-R10-R11-asn-PN2301 |
|
| R18-X000 | Changes to party contact information recorded |
St.27 status event code: A-5-5-R10-R18-oth-X000 |
|
| R18-X000 | Changes to party contact information recorded |
St.27 status event code: A-5-5-R10-R18-oth-X000 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 5 |
|
| R18-X000 | Changes to party contact information recorded |
St.27 status event code: A-5-5-R10-R18-oth-X000 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 6 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 7 |
|
| PN2301 | Change of applicant |
St.27 status event code: A-5-5-R10-R13-asn-PN2301 St.27 status event code: A-5-5-R10-R11-asn-PN2301 |
|
| PN2301 | Change of applicant |
St.27 status event code: A-5-5-R10-R13-asn-PN2301 St.27 status event code: A-5-5-R10-R11-asn-PN2301 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 8 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 9 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 10 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 11 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 12 |
|
| FPAY | Annual fee payment |
Payment date: 20110330 Year of fee payment: 13 |
|
| PR1001 | Payment of annual fee |
St.27 status event code: A-4-4-U10-U11-oth-PR1001 Fee payment year number: 13 |
|
| LAPS | Lapse due to unpaid annual fee | ||
| PC1903 | Unpaid annual fee |
St.27 status event code: A-4-4-U10-U13-oth-PC1903 Not in force date: 20120414 Payment event data comment text: Termination Category : DEFAULT_OF_REGISTRATION_FEE |
|
| R18-X000 | Changes to party contact information recorded |
St.27 status event code: A-5-5-R10-R18-oth-X000 |
|
| PC1903 | Unpaid annual fee |
St.27 status event code: N-4-6-H10-H13-oth-PC1903 Ip right cessation event data comment text: Termination Category : DEFAULT_OF_REGISTRATION_FEE Not in force date: 20120414 |