KR890015595A - 자동이득 제어장치 - Google Patents
자동이득 제어장치 Download PDFInfo
- Publication number
- KR890015595A KR890015595A KR1019890002626A KR890002626A KR890015595A KR 890015595 A KR890015595 A KR 890015595A KR 1019890002626 A KR1019890002626 A KR 1019890002626A KR 890002626 A KR890002626 A KR 890002626A KR 890015595 A KR890015595 A KR 890015595A
- Authority
- KR
- South Korea
- Prior art keywords
- converter
- clamp
- controlling
- output
- level
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/129—Means for adapting the input signal to the range the converter can handle, e.g. limiting, pre-scaling ; Out-of-range indication
- H03M1/1295—Clamping, i.e. adjusting the DC level of the input signal to a predetermined value
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
- H03M1/181—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values
- H03M1/182—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedback mode, i.e. by determining the range to be selected from one or more previous digital output values the feedback signal controlling the reference levels of the analogue/digital converter
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Television Systems (AREA)
- Television Receiver Circuits (AREA)
- Analogue/Digital Conversion (AREA)
- Picture Signal Circuits (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발명의 실시예의 있어서의 자동이득제어장치의 기준전압제어회로의 회로도.
Claims (1)
- 클램프레벨이 중심레벨에 설정되고 있는 신호를 입력하여서 클램프하고 A/D변환할때에 A/D변환기의 기준제어전압을 제어하여서 이들을 자동제어하는 장치에 있어서 상기 A/D변화기의 출력에서 클램프레벨을 검출하고 제어하는 클램프레벨제어회로와 이 출력을 D/A변환하는 제1의 D/A변환기와 D/A변화기의 출력을 상기 클램프회로의 클램프제어전압으로 하는 자동클램프레벨제어계와 상기 A/D변환기의 출력에서 프레임 펄스레벨을 검출하고 제어하는 프레임펄스제어회로와 이 출력을 D/A변환하는 제2의 D/A변환기를 구비하고 이 D/A변환기의 출력에 의해서 기준전압제어회로의 2개의 기준전압을 상·하대칭으로 제어하는 것을 특징으로 하는 자동이득 제어장치.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63051936A JP2678006B2 (ja) | 1988-03-04 | 1988-03-04 | 自動利得制御装置 |
JP88-51936 | 1988-03-04 | ||
JP63-51936 | 1988-03-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR890015595A true KR890015595A (ko) | 1989-10-30 |
KR930000456B1 KR930000456B1 (ko) | 1993-01-21 |
Family
ID=12900753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019890002626A KR930000456B1 (ko) | 1988-03-04 | 1989-03-03 | 자동 이득 제어장치 |
Country Status (6)
Country | Link |
---|---|
US (1) | US4998106A (ko) |
EP (1) | EP0331506B1 (ko) |
JP (1) | JP2678006B2 (ko) |
KR (1) | KR930000456B1 (ko) |
CA (1) | CA1299754C (ko) |
DE (1) | DE68916066T2 (ko) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084700A (en) * | 1991-02-04 | 1992-01-28 | Thomson Consumer Electronics, Inc. | Signal clamp circuitry for analog-to-digital converters |
US5488368A (en) * | 1993-05-28 | 1996-01-30 | Technoview Inc. | A/D converter system and method with temperature compensation |
US5359327A (en) * | 1993-05-28 | 1994-10-25 | Brown Eric W | A/D converter system with interface and passive voltage reference source |
US5644325A (en) * | 1994-12-12 | 1997-07-01 | Auravision Corporation | Digital to analog converter with improved output level control |
KR100207713B1 (ko) * | 1997-01-17 | 1999-07-15 | 윤종용 | 아날로그-디지탈 변환기의 top 전압을 이용한 agc 회로 |
JP4746792B2 (ja) * | 2001-08-14 | 2011-08-10 | 富士通セミコンダクター株式会社 | A/d変換装置 |
US8428536B2 (en) * | 2008-11-25 | 2013-04-23 | Silicon Laboratories Inc. | Low-cost receiver using automatic gain control |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4016557A (en) * | 1975-05-08 | 1977-04-05 | Westinghouse Electric Corporation | Automatic gain controlled amplifier apparatus |
JPS60217789A (ja) * | 1984-04-13 | 1985-10-31 | Hitachi Ltd | 高品位テレビ受信機 |
US4642694A (en) * | 1984-05-22 | 1987-02-10 | Casio Computer Co., Ltd. | Television video signal A/D converter |
US4549165A (en) * | 1984-06-22 | 1985-10-22 | Rockwell International Corporation | Dynamic voltage reference apparatus for A/D converters |
-
1988
- 1988-03-04 JP JP63051936A patent/JP2678006B2/ja not_active Expired - Lifetime
-
1989
- 1989-03-03 DE DE68916066T patent/DE68916066T2/de not_active Expired - Lifetime
- 1989-03-03 KR KR1019890002626A patent/KR930000456B1/ko not_active IP Right Cessation
- 1989-03-03 EP EP89302123A patent/EP0331506B1/en not_active Expired - Lifetime
- 1989-03-03 US US07/318,538 patent/US4998106A/en not_active Expired - Fee Related
- 1989-03-03 CA CA000592720A patent/CA1299754C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA1299754C (en) | 1992-04-28 |
EP0331506A2 (en) | 1989-09-06 |
KR930000456B1 (ko) | 1993-01-21 |
JPH01226284A (ja) | 1989-09-08 |
JP2678006B2 (ja) | 1997-11-17 |
EP0331506B1 (en) | 1994-06-15 |
US4998106A (en) | 1991-03-05 |
EP0331506A3 (en) | 1991-07-31 |
DE68916066T2 (de) | 1994-11-17 |
DE68916066D1 (de) | 1994-07-21 |
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Legal Events
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20090109 Year of fee payment: 17 |
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EXPY | Expiration of term |