JP4829088B2 - 信号処理回路 - Google Patents
信号処理回路 Download PDFInfo
- Publication number
- JP4829088B2 JP4829088B2 JP2006330328A JP2006330328A JP4829088B2 JP 4829088 B2 JP4829088 B2 JP 4829088B2 JP 2006330328 A JP2006330328 A JP 2006330328A JP 2006330328 A JP2006330328 A JP 2006330328A JP 4829088 B2 JP4829088 B2 JP 4829088B2
- Authority
- JP
- Japan
- Prior art keywords
- difference
- phase
- input signal
- value
- sampling
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
- H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
- H04L7/0334—Processing of samples having at least three levels, e.g. soft decisions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
- G09G5/008—Clock recovery
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M1/08—Continuously compensating for, or preventing, undesired influence of physical parameters of noise
- H03M1/0863—Continuously compensating for, or preventing, undesired influence of physical parameters of noise of switching transients, e.g. glitches
-
- 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
- H03M1/1245—Details of sampling arrangements or methods
- H03M1/1255—Synchronisation of the sampling frequency or phase to the input frequency or phase
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
Description
本発明の実施の形態における信号処理回路は、図1に示すように、位相調整回路100、制御部(CPU)102及びアナログ/デジタル回路(ADC)104を含んで構成される。本実施の形態では、信号処理回路として映像信号をデジタル化してサンプリングするための回路を例に説明を行うがこれに限定されるものではない。
以下、信号処理回路におけるサンプリングの位相調整処理について、図3のフローチャート及び図4のタイミングチャートを参照しつつ説明する。
Claims (3)
- パルス状の入力信号をサンプリングするタイミングを決定する信号処理回路であって、
前記入力信号のパルスの変動点を検出する変動点検出手段を備え、
前記変動点検出手段は、
前記入力信号の複数のサンプリング値間の差分値を求める第1の差分演算器と、
前記第1の差分演算器で処理されるサンプリング値とは異なる時点における前記入力信号の複数のサンプリング値間の差分値を求める第2の差分演算器と、
前記第1及び第2の差分演算器で求められた差分値間の差分値を求める第3の差分演算器と、を備え、
前記第3の差分演算器の値に基づいて前記入力信号のパルスの変動点を検出し、前記変動点検出手段において検出された前記入力信号のパルスの変動点から所定の位相幅ずれた位相点を前記入力信号のサンプリングのタイミングとして設定することを特徴とする信号処理回路。 - 請求項1に記載の信号処理回路であって、
前記変動点検出手段は、前記第3の差分演算器の値が最大となるときのサンプリングのタイミングを前記入力信号のパルスの変動点として検出することを特徴とする信号処理回路。 - 請求項1又は2に記載の信号処理回路であって、
前記所定の位相差は50°以上310°以下であることを特徴とする信号処理回路。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006330328A JP4829088B2 (ja) | 2006-12-07 | 2006-12-07 | 信号処理回路 |
CN200710196933.2A CN101197570B (zh) | 2006-12-07 | 2007-12-06 | 信号处理电路 |
US11/951,795 US8098785B2 (en) | 2006-12-07 | 2007-12-06 | Signal processing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006330328A JP4829088B2 (ja) | 2006-12-07 | 2006-12-07 | 信号処理回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008147825A JP2008147825A (ja) | 2008-06-26 |
JP4829088B2 true JP4829088B2 (ja) | 2011-11-30 |
Family
ID=39547758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006330328A Expired - Fee Related JP4829088B2 (ja) | 2006-12-07 | 2006-12-07 | 信号処理回路 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8098785B2 (ja) |
JP (1) | JP4829088B2 (ja) |
CN (1) | CN101197570B (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009300467A (ja) * | 2008-06-10 | 2009-12-24 | Kenwood Corp | 表示調整方法及び表示装置 |
JP2010016718A (ja) * | 2008-07-04 | 2010-01-21 | Sanyo Electric Co Ltd | 信号処理回路 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0537907A (ja) * | 1991-02-13 | 1993-02-12 | Sharp Corp | Pll回路 |
JP2884792B2 (ja) * | 1991-02-19 | 1999-04-19 | 日本電気株式会社 | タイミング抽出装置 |
US5216554A (en) * | 1991-07-01 | 1993-06-01 | International Business Machines Corporation | Digital phase error estimator |
JP2624043B2 (ja) * | 1991-07-30 | 1997-06-25 | 日本ビクター株式会社 | 画像処理システムにおけるサンプリング位相調整装置 |
JP2659060B2 (ja) * | 1994-07-06 | 1997-09-30 | 日本電気株式会社 | 周波数誤差検出方法 |
JPH10319917A (ja) * | 1997-05-19 | 1998-12-04 | Sharp Corp | 映像信号の自動位相調整装置 |
JP3908033B2 (ja) * | 1999-06-04 | 2007-04-25 | 三菱電機株式会社 | 位相検出装置、これを用いたタイミング再生装置、および、これを用いた復調装置 |
JP2001356729A (ja) * | 2000-06-15 | 2001-12-26 | Nec Mitsubishi Denki Visual Systems Kk | 画像表示装置 |
JP3647364B2 (ja) * | 2000-07-21 | 2005-05-11 | Necエレクトロニクス株式会社 | クロック制御方法及び回路 |
US7397876B2 (en) * | 2004-08-11 | 2008-07-08 | International Business Machines Corporation | Methods and arrangements for link power reduction |
-
2006
- 2006-12-07 JP JP2006330328A patent/JP4829088B2/ja not_active Expired - Fee Related
-
2007
- 2007-12-06 CN CN200710196933.2A patent/CN101197570B/zh not_active Expired - Fee Related
- 2007-12-06 US US11/951,795 patent/US8098785B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN101197570B (zh) | 2012-06-27 |
US20080260083A1 (en) | 2008-10-23 |
JP2008147825A (ja) | 2008-06-26 |
CN101197570A (zh) | 2008-06-11 |
US8098785B2 (en) | 2012-01-17 |
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