JP2012147361A - 演算増幅回路 - Google Patents
演算増幅回路 Download PDFInfo
- Publication number
- JP2012147361A JP2012147361A JP2011005699A JP2011005699A JP2012147361A JP 2012147361 A JP2012147361 A JP 2012147361A JP 2011005699 A JP2011005699 A JP 2011005699A JP 2011005699 A JP2011005699 A JP 2011005699A JP 2012147361 A JP2012147361 A JP 2012147361A
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- JP
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- Prior art keywords
- circuit
- output
- voltage
- common
- common mode
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- 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
- H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
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- 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
- H03F3/45192—Folded cascode stages
-
- 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
- H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
- H03F3/45632—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with FET transistors as the active amplifying circuit
- H03F3/45636—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection in differential amplifiers with FET transistors as the active amplifying circuit by using feedback means
- H03F3/45641—Measuring at the loading circuit of the differential amplifier
- H03F3/4565—Controlling the common source circuit of the differential amplifier
-
- 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
- H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection
- H03F3/45928—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit
- H03F3/45932—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection using IC blocks as the active amplifying circuit by using feedback means
- H03F3/45937—Measuring at the loading circuit of the differential amplifier
-
- 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
- H03F2203/45082—Indexing scheme relating to differential amplifiers the common mode signal being taken or deducted from the one or more outputs of the differential amplifier
-
- 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
- H03F2203/45406—Indexing scheme relating to differential amplifiers the CMCL comprising a common source node of a long tail FET pair as an addition circuit
-
- 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
- H03F2203/45444—Indexing scheme relating to differential amplifiers the CMCL comprising a sample and hold circuit
-
- 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
- H03F2203/45482—Indexing scheme relating to differential amplifiers the CSC comprising offset means
Abstract
【解決手段】入力切替回路14がコモンモード参照電圧を選択してコモンモード基準電圧として出力したときの全差動増幅回路10の同相出力電圧をコモンモード検出回路11が検出した後、S/H回路12がコモンモード検出回路11の出力のサンプル及びホールドを行い、演算回路13がS/H回路12の出力とコモンモード参照電圧とのずれ量とコモンモード参照電圧とに基づく電圧を出力し、入力切替回路14が演算回路13の出力を選択してコモンモード基準電圧として出力する。
【選択図】図2
Description
Vbase’ = Vref’ ・・・(1)
Vcm’ = Vbase’ + Verr’= Vref’ + Verr’ ・・・(2)
Vbuf’ = Vref’ + Verr’ ・・・(3)
Vop’ = Vref’ + (Vref’ - Vbuf’)= Vref’ - Verr’ ・・・(4)
Vbase’ = Vref’ - Verr’ ・・・(5)
Vcm’ = Vbase’ + Verr’ = Vref’ - Verr’ + Verr’ = Vref’ ・・・(6)
Claims (3)
- コモンモードフィードバックを有し、コモンモード基準電圧を中心に演算増幅を行う全差動増幅回路と、
前記全差動増幅回路の同相出力電圧を検出するコモンモード検出回路と、
前記コモンモード検出回路の出力のサンプル及びホールドを行うサンプルホールド回路と、
前記サンプルホールド回路の出力とコモンモード参照電圧とのずれ量を検出し、検出したずれ量と前記コモンモード参照電圧とに基づく電圧を出力する演算回路と、
前記コモンモード参照電圧または前記演算回路の出力を選択して、前記コモンモード基準電圧として出力する切替回路と、
を有し、
前記切替回路が前記コモンモード参照電圧を選択して前記コモンモード基準電圧として出力したときの前記全差動増幅回路の同相出力電圧を前記コモンモード検出回路が検出した後、前記サンプルホールド回路が前記コモンモード検出回路の出力のサンプル及びホールドを行い、
前記演算回路が前記ずれ量と前記コモンモード参照電圧とに基づく電圧を出力し、
前記切替回路が前記演算回路の出力を選択して前記コモンモード基準電圧として出力することにより、前記コモンモード基準電圧に補正を加えることを特徴とする演算増幅回路。 - 前記全差動増幅回路が折り返し型の全差動増幅回路で構成されることを特徴とする請求項1に記載の演算増幅回路。
- 前記演算回路が減算回路で構成されることを特徴とする請求項1に記載の演算増幅回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011005699A JP5551626B2 (ja) | 2011-01-14 | 2011-01-14 | 演算増幅回路 |
US13/349,861 US8519793B2 (en) | 2011-01-14 | 2012-01-13 | Operational amplifier circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011005699A JP5551626B2 (ja) | 2011-01-14 | 2011-01-14 | 演算増幅回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2012147361A true JP2012147361A (ja) | 2012-08-02 |
JP5551626B2 JP5551626B2 (ja) | 2014-07-16 |
Family
ID=46490321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011005699A Expired - Fee Related JP5551626B2 (ja) | 2011-01-14 | 2011-01-14 | 演算増幅回路 |
Country Status (2)
Country | Link |
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US (1) | US8519793B2 (ja) |
JP (1) | JP5551626B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115173817A (zh) * | 2022-09-05 | 2022-10-11 | 深圳市单源半导体有限公司 | 一种差分放大电路、误差放大电路及其修调方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150061767A1 (en) * | 2013-08-28 | 2015-03-05 | Texas Instruments Incorporated | Telescopic Amplifier with Improved Common Mode Settling |
US20150212643A1 (en) * | 2014-01-27 | 2015-07-30 | Samsung Electronics Co., Ltd. | Touch sensing controller, touch sensing device and touch sensing system including the same |
EP2963811B1 (en) * | 2014-06-30 | 2018-11-14 | Nxp B.V. | Driver for switched capacitor circuits |
US10054619B2 (en) * | 2017-01-03 | 2018-08-21 | General Electric Company | Systems and methods for voltage sensing |
WO2021058630A1 (en) * | 2019-09-24 | 2021-04-01 | Analog Devices International Unlimited Company | Stabilizing common mode of differential switching output stage |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02224510A (ja) * | 1988-12-23 | 1990-09-06 | Texas Instr Inc <Ti> | 演算増幅器用のコモン・モード・フィードバック回路及び演算増幅器 |
JPH05167363A (ja) * | 1991-12-19 | 1993-07-02 | Fujitsu Ltd | 差動入力・差動出力型オペアンプ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6265941B1 (en) * | 1999-11-12 | 2001-07-24 | Agere Systems Guardian Corp. | Balanced differential amplifier having common mode feedback with kick-start |
JP4290721B2 (ja) | 2006-11-15 | 2009-07-08 | シャープ株式会社 | バンドパスフィルタ回路、並びに赤外線信号処理回路 |
-
2011
- 2011-01-14 JP JP2011005699A patent/JP5551626B2/ja not_active Expired - Fee Related
-
2012
- 2012-01-13 US US13/349,861 patent/US8519793B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02224510A (ja) * | 1988-12-23 | 1990-09-06 | Texas Instr Inc <Ti> | 演算増幅器用のコモン・モード・フィードバック回路及び演算増幅器 |
JPH05167363A (ja) * | 1991-12-19 | 1993-07-02 | Fujitsu Ltd | 差動入力・差動出力型オペアンプ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115173817A (zh) * | 2022-09-05 | 2022-10-11 | 深圳市单源半导体有限公司 | 一种差分放大电路、误差放大电路及其修调方法 |
Also Published As
Publication number | Publication date |
---|---|
JP5551626B2 (ja) | 2014-07-16 |
US20120182071A1 (en) | 2012-07-19 |
US8519793B2 (en) | 2013-08-27 |
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