JP6619668B2 - 比較器およびデルタシグマ変調回路 - Google Patents
比較器およびデルタシグマ変調回路 Download PDFInfo
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- JP6619668B2 JP6619668B2 JP2016030651A JP2016030651A JP6619668B2 JP 6619668 B2 JP6619668 B2 JP 6619668B2 JP 2016030651 A JP2016030651 A JP 2016030651A JP 2016030651 A JP2016030651 A JP 2016030651A JP 6619668 B2 JP6619668 B2 JP 6619668B2
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- transistor
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- 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
- H03M3/326—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 by averaging out the errors
- H03M3/328—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 by averaging out the errors using dither
- H03M3/33—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 by averaging out the errors using dither the dither being a random signal
- H03M3/332—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 by averaging out the errors using dither the dither being a random signal in particular a pseudo-random signal
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
-
- 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
-
- 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
- H03M3/494—Sampling or signal conditioning arrangements specially adapted for delta-sigma type analogue/digital conversion systems
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Analogue/Digital Conversion (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Manipulation Of Pulses (AREA)
Description
また、本発明の比較器の1構成例において、前記デジタルディザ信号は、疑似乱数信号である。
また、本発明のデルタシグマ変調回路は、差動入力信号を積分する積分器と、この積分器から出力された差動出力信号を入力とする比較器とを備えることを特徴とするものである。
このオフセット発生器11に供給される差動デジタルディザ信号d0,d1を生成するデジタルディザ信号生成回路としては、例えば図8に示したような疑似乱数信号発生回路を利用すればよい。ここでは、差動信号を用いるので、疑似乱数信号発生回路のシングルエンド出力信号を差動信号に変換する変換回路を用いて差動デジタルディザ信号d0,d1を生成すればよい。
図3に示すデルタシグマ変調回路の後段にデジタルフィルタを接続すればデルタシグマ型AD変換器を実現することができる。
また、そもそもd0,d1はロジック信号であるため、スイッチS10、S11を用いる代わりに、図には示していないがd0,d1それぞれと、必要な個数に対応する数に応じた論理積(AND)を取ることで並列トランジスタの個数を切り替える信号を用意し、X11,X12のゲートに印可しても良い。
Claims (3)
- 差動入力信号の差に応じた信号を出力する差動増幅器と、
デジタルディザ信号に応じて前記差動増幅器のオフセット電圧を増減させるオフセット発生器とを備え、
前記差動増幅器は、
第1の差動対トランジスタと、
この第1の差動対トランジスタと同一の差動入力信号を入力とし、前記第1の差動対トランジスタと並列に配置された第2の差動対トランジスタとから構成され、
前記オフセット発生器は、前記第2の差動対トランジスタとカスコード接続され、前記デジタルディザ信号に応じてON/OFFする第3の差動対トランジスタとから構成されることを特徴とする比較器。 - 請求項1記載の比較器において、
前記デジタルディザ信号は、疑似乱数信号であることを特徴とする比較器。 - 差動入力信号を積分する積分器と、
この積分器から出力された差動出力信号を入力とする、請求項1または2記載の比較器とを備えることを特徴とするデルタシグマ変調回路。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016030651A JP6619668B2 (ja) | 2016-02-22 | 2016-02-22 | 比較器およびデルタシグマ変調回路 |
KR1020170021546A KR101920990B1 (ko) | 2016-02-22 | 2017-02-17 | 비교기 및 델타 시그마 변조 회로 |
CN201710093978.0A CN107104675B (zh) | 2016-02-22 | 2017-02-21 | 比较器以及δς调制电路 |
TW106105731A TWI654847B (zh) | 2016-02-22 | 2017-02-21 | Comparator and delta-sigma modulation circuit |
Applications Claiming Priority (1)
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JP2016030651A JP6619668B2 (ja) | 2016-02-22 | 2016-02-22 | 比較器およびデルタシグマ変調回路 |
Publications (2)
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JP2017152761A JP2017152761A (ja) | 2017-08-31 |
JP6619668B2 true JP6619668B2 (ja) | 2019-12-11 |
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JP2016030651A Active JP6619668B2 (ja) | 2016-02-22 | 2016-02-22 | 比較器およびデルタシグマ変調回路 |
Country Status (4)
Country | Link |
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JP (1) | JP6619668B2 (ja) |
KR (1) | KR101920990B1 (ja) |
CN (1) | CN107104675B (ja) |
TW (1) | TWI654847B (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107888155B (zh) * | 2017-12-27 | 2024-04-02 | 苏州菲达旭微电子有限公司 | 一种多输入放大器及包括该放大器的双控制电路 |
CN115617584A (zh) * | 2021-07-16 | 2023-01-17 | 长鑫存储技术有限公司 | 接收器、存储器及测试方法 |
JP7366277B2 (ja) | 2021-07-16 | 2023-10-20 | チャンシン メモリー テクノロジーズ インコーポレイテッド | 受信機、メモリ及び検証方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06104751A (ja) * | 1992-09-17 | 1994-04-15 | Fujitsu Ltd | Δς変調型a/d変換器 |
CN1748220A (zh) * | 2003-02-06 | 2006-03-15 | 皇家飞利浦电子股份有限公司 | 伺服系统、包括伺服系统的装置、∑-△调制器、和包括∑-△调制器的集成电路 |
JP4562624B2 (ja) * | 2005-09-12 | 2010-10-13 | 三洋電機株式会社 | デルタシグマ変調回路 |
JP4687512B2 (ja) * | 2006-03-08 | 2011-05-25 | トヨタ自動車株式会社 | Δς型ad変換器 |
US7999620B2 (en) * | 2008-12-12 | 2011-08-16 | Analog Devices, Inc. | Amplifier with dither |
-
2016
- 2016-02-22 JP JP2016030651A patent/JP6619668B2/ja active Active
-
2017
- 2017-02-17 KR KR1020170021546A patent/KR101920990B1/ko active IP Right Grant
- 2017-02-21 CN CN201710093978.0A patent/CN107104675B/zh active Active
- 2017-02-21 TW TW106105731A patent/TWI654847B/zh active
Also Published As
Publication number | Publication date |
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KR20170098707A (ko) | 2017-08-30 |
JP2017152761A (ja) | 2017-08-31 |
TWI654847B (zh) | 2019-03-21 |
CN107104675A (zh) | 2017-08-29 |
KR101920990B1 (ko) | 2018-11-21 |
CN107104675B (zh) | 2020-06-30 |
TW201733271A (zh) | 2017-09-16 |
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