JP2001500339A - 同期シグマ―デルタ変調器 - Google Patents
同期シグマ―デルタ変調器Info
- Publication number
- JP2001500339A JP2001500339A JP10529319A JP52931998A JP2001500339A JP 2001500339 A JP2001500339 A JP 2001500339A JP 10529319 A JP10529319 A JP 10529319A JP 52931998 A JP52931998 A JP 52931998A JP 2001500339 A JP2001500339 A JP 2001500339A
- Authority
- JP
- Japan
- Prior art keywords
- output
- delta modulator
- pulse
- sampler
- pulses
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/322—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M3/324—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by means or methods for compensating or preventing more than one type of error at a time, e.g. by synchronisation or using a ratiometric arrangement
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/322—Continuously compensating for, or preventing, undesired influence of physical parameters
- H03M3/368—Continuously compensating for, or preventing, undesired influence of physical parameters of noise other than the quantisation noise already being shaped inherently by delta-sigma modulators
- H03M3/37—Compensation or reduction of delay or phase error
- H03M3/374—Relaxation of settling time constraints, e.g. slew rate enhancement
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
- H03M3/412—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution
- H03M3/422—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
- H03M3/43—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a single bit one
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/458—Analogue/digital converters using delta-sigma modulation as an intermediate step
- H03M3/466—Multiplexed conversion systems
- H03M3/468—Interleaved, i.e. using multiple converters or converter parts for one channel, e.g. using Hadamard codes, pi-delta-sigma converters
- H03M3/47—Interleaved, i.e. using multiple converters or converter parts for one channel, e.g. using Hadamard codes, pi-delta-sigma converters using time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.積分フィルタと、この積分フィルタの出力信号を基準レベルと比較するとと もに同期をとった瞬時の比較結果に依存する出力パルスを発生させる決定回路 と、前記決定回路の出力パルスをアナログ入力信号とともに前記積分フィルタ に供給する手段とを帰還配置に具える、アナログ入力信号用の同期シグマーデ ルタ変調器において、前記決定回路(4)が、位相シフトした出力パルスを発 生させる複数のサンプラ(71...7N)を有する多相サンプラ(7,9)と 、前記位相シフトした出力パルスの和を前記積分フィルタ(5)に供給する加 算器(10)とを具えることを特徴とする同期シグマ−デルタ変調器。 2.零点入力信号で特定のリミットサイクル周波数を有する請求項1記載の同期 シグマ−デルタ変調器において、前記零点入力信号の周波数が、前記多相サン プラが動作する有効サンプリング周波数(fs)より十分低いことを特徴とす る同期シグマ−デルタ変調器。 3.前記加算器(10)に供給される出力パルスの幅を、これらパルスの周期の 半分(「1/2T」パルス)に等しくしたことを特徴とする請求の範囲1記載 の同期シグマ−デルタ変調器。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97201127 | 1997-04-16 | ||
EP97201127.4 | 1997-04-16 | ||
PCT/IB1998/000323 WO1998049828A2 (en) | 1997-04-16 | 1998-03-12 | Synchronous sigma-delta modulator |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2001500339A true JP2001500339A (ja) | 2001-01-09 |
JP2001500339A5 JP2001500339A5 (ja) | 2005-10-06 |
JP3917190B2 JP3917190B2 (ja) | 2007-05-23 |
Family
ID=8228212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52931998A Expired - Fee Related JP3917190B2 (ja) | 1997-04-16 | 1998-03-12 | 同期シグマ―デルタ変調器 |
Country Status (4)
Country | Link |
---|---|
US (1) | US6097325A (ja) |
EP (1) | EP0923807A2 (ja) |
JP (1) | JP3917190B2 (ja) |
WO (1) | WO1998049828A2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7528760B2 (en) * | 2007-01-26 | 2009-05-05 | Texas Insturments Incorporated | Class D analog-to-digital converter |
US7916054B2 (en) * | 2008-11-07 | 2011-03-29 | Baker R Jacob | K-delta-1-sigma modulator |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2731151B2 (ja) * | 1987-09-18 | 1998-03-25 | 株式会社東芝 | 位相情報検出回路 |
US4926178A (en) * | 1988-07-13 | 1990-05-15 | Analog Devices, Inc. | Delta modulator with integrator having positive feedback |
US5055846A (en) * | 1988-10-13 | 1991-10-08 | Crystal Semiconductor Corporation | Method for tone avoidance in delta-sigma converters |
NL9100379A (nl) * | 1991-03-01 | 1992-10-01 | Philips Nv | Sigma-deltamodulator. |
US5274372A (en) * | 1992-10-23 | 1993-12-28 | Tektronix, Inc. | Sampling rate conversion using polyphase filters with interpolation |
US5471209A (en) * | 1994-03-03 | 1995-11-28 | Echelon Corporation | Sigma-delta converter having a digital logic gate core |
US5621408A (en) * | 1995-02-24 | 1997-04-15 | Lecroy Corporation | Delta sigma analog-to-digital converter with temporally interleaved architecture |
US5719571A (en) * | 1995-09-22 | 1998-02-17 | Sony Corporation | Sampling rate converting method and apparatus |
-
1998
- 1998-03-12 WO PCT/IB1998/000323 patent/WO1998049828A2/en not_active Application Discontinuation
- 1998-03-12 JP JP52931998A patent/JP3917190B2/ja not_active Expired - Fee Related
- 1998-03-12 EP EP98905546A patent/EP0923807A2/en not_active Withdrawn
- 1998-04-14 US US09/060,085 patent/US6097325A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US6097325A (en) | 2000-08-01 |
EP0923807A2 (en) | 1999-06-23 |
WO1998049828A2 (en) | 1998-11-05 |
JP3917190B2 (ja) | 2007-05-23 |
WO1998049828A3 (en) | 1999-02-04 |
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