JP4854695B2 - 差動コンパレータ及びパイプライン型a/d変換器 - Google Patents
差動コンパレータ及びパイプライン型a/d変換器 Download PDFInfo
- Publication number
- JP4854695B2 JP4854695B2 JP2008066296A JP2008066296A JP4854695B2 JP 4854695 B2 JP4854695 B2 JP 4854695B2 JP 2008066296 A JP2008066296 A JP 2008066296A JP 2008066296 A JP2008066296 A JP 2008066296A JP 4854695 B2 JP4854695 B2 JP 4854695B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- differential
- multiplexer
- signal
- switch
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
- H03F3/45071—Differential amplifiers with semiconductor devices only
- H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
- H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
- H03F3/45183—Long tailed pairs
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
- H03K3/356—Bistable circuits
- H03K3/356104—Bistable circuits using complementary field-effect transistors
- H03K3/356113—Bistable circuits using complementary field-effect transistors using additional transistors in the input circuit
- H03K3/35613—Bistable circuits using complementary field-effect transistors using additional transistors in the input circuit the input circuit having a differential configuration
- H03K3/356139—Bistable circuits using complementary field-effect transistors using additional transistors in the input circuit the input circuit having a differential configuration with synchronous operation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45702—Indexing scheme relating to differential amplifiers the LC comprising two resistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/45—Indexing scheme relating to differential amplifiers
- H03F2203/45726—Indexing scheme relating to differential amplifiers the LC comprising more than one switch, which are not cross coupled
Description
2 S/H
3 A/D変換器
4 D/A変換器
5 減算器
6 残差増幅器
7 デジタル補正回路
8 デジタル出力
9 Vin
10 比較器
11 2入力NOR回路
12 エンコーダ
13 Dout
20 差動アンプ
21 第1切換スイッチ部
22 スイッチ機能付き保持部
23 第2切換スイッチ部
Claims (3)
- 差動アンプと、
前記差動アンプからの差動出力信号のうち、一方の差動出力信号を第1及び第2アナログスイッチに印加し、他方の差動出力信号を第3及び第4アナログスイッチに印加し、前記第1アナログスイッチと前記第3アナログスイッチとが第1出力端子に接続され、前記第2アナログスイッチと前記第4アナログスイッチとが第2出力端子に接続される第1スイッチ部と、
前記第1出力端子からの出力信号を保持する第1保持回路と前記第2出力端子からの出力信号を保持する第2保持回路とスイッチとを有すると共に、前記第1及び第2保持回路は前記スイッチのオンオフに応じて、データの更新と保持を切り替える保持部と、
前記第1及び第2保持回路からの出力信号を2つに分け、分けた2つの信号のうち、一方の信号同士を組み合わせて第1マルチプレクサに接続し、他方の信号同士を組み合わせて第2マルチプレクサに接続し、前記第1マルチプレクサから出力される第1選択出力端子と、前記第2マルチプレクサから出力される第2選択出力端子とを有する第2スイッチ部と、を備え、
前記差動出力信号は、前記第1乃至第4アナログスイッチ及び前記第1乃至第2マルチプレクサが相補的に切り替わることで、前記第1保持回路と前記第2保持回路で切り替わり保持され、常に同じ前記第1及び第2選択出力端子から出力されることを特徴とする差動コンパレータ。 - 差動アンプと、
前記差動アンプからの差動出力信号を2つに分け、分けた2つの信号のうち、一方の信号同士を組み合わせて第1マルチプレクサに接続し、他方の信号同士を組み合わせて第2マルチプレクサに接続し、前記第1マルチプレクサから出力される第1選択出力端子と、前記第2マルチプレクサから出力される第2選択出力端子とを有する第1スイッチ部と、
前記第1出力端子からの出力信号を保持する第1保持回路と前記第2出力端子からの出力信号を保持する第2保持回路とスイッチとを有すると共に、前記第1及び第2保持回路は前記スイッチのオンオフに応じて、データの更新と保持を切り替える保持部と、
前記第1及び第2保持回路からの出力信号を2つに分け、分けた2つの信号のうち、一方の信号同士を組み合わせて第3マルチプレクサに接続し、他方の信号同士を組み合わせて第4マルチプレクサに接続し、前記第3マルチプレクサから出力される第3選択出力端子と、前記第4マルチプレクサから出力される第4選択出力端子とを有する第2スイッチ部と、を備え、
前記差動出力信号は、前記第1乃至第4マルチプレクサが相補的に切り替わることで、前記第1保持回路と前記第2保持回路で切り替わり保持され、常に同じ前記第3及び第4選択出力端子から出力されることを特徴とする差動コンパレータ。 - 請求項1又は2記載の差動コンパレータを備えたことを特長とするパイプライン型A/D変換器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008066296A JP4854695B2 (ja) | 2008-03-14 | 2008-03-14 | 差動コンパレータ及びパイプライン型a/d変換器 |
US12/404,835 US7817077B2 (en) | 2008-03-14 | 2009-03-16 | Differential comparator, and pipeline type A/D converter equipped with the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008066296A JP4854695B2 (ja) | 2008-03-14 | 2008-03-14 | 差動コンパレータ及びパイプライン型a/d変換器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009225026A JP2009225026A (ja) | 2009-10-01 |
JP4854695B2 true JP4854695B2 (ja) | 2012-01-18 |
Family
ID=41116303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008066296A Expired - Fee Related JP4854695B2 (ja) | 2008-03-14 | 2008-03-14 | 差動コンパレータ及びパイプライン型a/d変換器 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7817077B2 (ja) |
JP (1) | JP4854695B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8248290B2 (en) * | 2010-09-13 | 2012-08-21 | Texas Instruments Incorporated | Multiplexed amplifier with reduced glitching |
US9124279B2 (en) | 2012-09-03 | 2015-09-01 | Tensorcom, Inc. | Method and apparatus for an active negative-capacitor circuit to cancel the input capacitance of comparators |
US11088666B2 (en) * | 2018-10-11 | 2021-08-10 | Microchip Technology Incorporated | Operational amplifier with controllable output modes |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3153271B2 (ja) | 1991-07-05 | 2001-04-03 | 株式会社日立製作所 | Ad変換器 |
JPH0779161A (ja) * | 1993-09-06 | 1995-03-20 | Matsushita Electric Ind Co Ltd | アナログ・デジタル変換器 |
JP4178702B2 (ja) * | 1999-12-28 | 2008-11-12 | ソニー株式会社 | 差動増幅器、コンパレータ、及びa/dコンバータ |
US6617992B2 (en) * | 2001-08-15 | 2003-09-09 | National Semiconductor Corporation | Capacitor mismatch independent gain stage for differential pipeline analog to digital converters |
US6778126B2 (en) * | 2002-11-21 | 2004-08-17 | Analog Devices, Inc. | Structures and methods that improve the linearity of analog-to-digital converters with introduced nonlinearities |
JP2004236143A (ja) * | 2003-01-31 | 2004-08-19 | Toshiba Corp | パイプライン型a/d変換器 |
-
2008
- 2008-03-14 JP JP2008066296A patent/JP4854695B2/ja not_active Expired - Fee Related
-
2009
- 2009-03-16 US US12/404,835 patent/US7817077B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2009225026A (ja) | 2009-10-01 |
US20090243906A1 (en) | 2009-10-01 |
US7817077B2 (en) | 2010-10-19 |
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