WO2003003568A3 - Active auto zero circuit for programmable time continuous open loop amplifiers - Google Patents

Active auto zero circuit for programmable time continuous open loop amplifiers Download PDF

Info

Publication number
WO2003003568A3
WO2003003568A3 PCT/US2002/016738 US0216738W WO03003568A3 WO 2003003568 A3 WO2003003568 A3 WO 2003003568A3 US 0216738 W US0216738 W US 0216738W WO 03003568 A3 WO03003568 A3 WO 03003568A3
Authority
WO
WIPO (PCT)
Prior art keywords
offset
phase
amplifier
open loop
time continuous
Prior art date
Application number
PCT/US2002/016738
Other languages
French (fr)
Other versions
WO2003003568A2 (en
Inventor
Thomas Blon
Sasan Cyrusian
Original Assignee
Infineon Technologies Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US09/896,279 external-priority patent/US6552593B2/en
Application filed by Infineon Technologies Corp filed Critical Infineon Technologies Corp
Publication of WO2003003568A2 publication Critical patent/WO2003003568A2/en
Publication of WO2003003568A3 publication Critical patent/WO2003003568A3/en

Links

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
    • H03F3/45197—Pl types
    • 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
    • H03F3/45659—Controlling the loading 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
    • H03F3/45632—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
    • H03F3/45744—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 offset reduction
    • H03F3/45748—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 offset reduction by using a feedback circuit
    • H03F3/45753—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 offset reduction by using a feedback circuit using switching means, e.g. sample and hold
    • 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
    • H03F2203/45616—Indexing scheme relating to differential amplifiers the IC comprising more than one switch, which are not cross coupled

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

An active offset cancellation circuit for an open loop differential amplifier having programmable gain is disclosed. The amplifier is operated on a two-phase clock where the normal operation occurs on the first phase and offset detection and cancellation occurs on the second phase. The circuit adjusts a bias current and stores this adjustment to cancel offset during the operational phase of the amplifier. During the operational phase, the first phase of the clock, the programmable gain is again returned to a value according to the application and the stored adjustment is used to bias the current in one of the two input stages of the amplifier, canceling any offset imparted by the amplifier circuitry. One each clock cycle, any additional offset is similarly detected and canceled. Further, by varying the gain as described, residual offset is reduced.
PCT/US2002/016738 2001-06-29 2002-05-28 Active auto zero circuit for programmable time continuous open loop amplifiers WO2003003568A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/896,279 2001-06-29
US09/896,279 US6552593B2 (en) 2001-05-25 2001-06-29 Active auto zero circuit for programmable time continuous open loop amplifiers

Publications (2)

Publication Number Publication Date
WO2003003568A2 WO2003003568A2 (en) 2003-01-09
WO2003003568A3 true WO2003003568A3 (en) 2004-01-15

Family

ID=25405937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/016738 WO2003003568A2 (en) 2001-06-29 2002-05-28 Active auto zero circuit for programmable time continuous open loop amplifiers

Country Status (1)

Country Link
WO (1) WO2003003568A2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4568885A (en) * 1985-04-29 1986-02-04 Motorola, Inc. Fully differential operational amplifier with D.C. common-mode feedback
US4697152A (en) * 1986-04-11 1987-09-29 Motorola, Inc. Fully differential switched capacitor amplifier having autozeroed common-mode feedback
US4884039A (en) * 1988-09-09 1989-11-28 Texas Instruments Incorporated Differential amplifier with low noise offset compensation
EP0768751A1 (en) * 1995-09-29 1997-04-16 Rockwell International Corporation Improved offset cancellation for differential amplifiers
DE19609621C1 (en) * 1996-03-12 1997-07-24 Sican Gmbh Offset compensation for interval driven cascaded difference amplifiers
US6087897A (en) * 1999-05-06 2000-07-11 Burr-Brown Corporation Offset and non-linearity compensated amplifier and method
US6140872A (en) * 1999-10-28 2000-10-31 Burr-Brown Corporation Offset-compensated amplifier input stage and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4568885A (en) * 1985-04-29 1986-02-04 Motorola, Inc. Fully differential operational amplifier with D.C. common-mode feedback
US4697152A (en) * 1986-04-11 1987-09-29 Motorola, Inc. Fully differential switched capacitor amplifier having autozeroed common-mode feedback
US4884039A (en) * 1988-09-09 1989-11-28 Texas Instruments Incorporated Differential amplifier with low noise offset compensation
EP0768751A1 (en) * 1995-09-29 1997-04-16 Rockwell International Corporation Improved offset cancellation for differential amplifiers
DE19609621C1 (en) * 1996-03-12 1997-07-24 Sican Gmbh Offset compensation for interval driven cascaded difference amplifiers
US6087897A (en) * 1999-05-06 2000-07-11 Burr-Brown Corporation Offset and non-linearity compensated amplifier and method
US6140872A (en) * 1999-10-28 2000-10-31 Burr-Brown Corporation Offset-compensated amplifier input stage and method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
WUNDERLICH R ET AL: "A linear operational transconductance amplifier with automatic offset cancellation and transconductance calibration", ELECTRONICS, CIRCUITS AND SYSTEMS, 1999. PROCEEDINGS OF ICECS '99. THE 6TH IEEE INTERNATIONAL CONFERENCE ON PAFOS, CYPRUS 5-8 SEPT. 1999, PISCATAWAY, NJ, USA,IEEE, US, 5 September 1999 (1999-09-05), pages 1321 - 1324, XP010361754, ISBN: 0-7803-5682-9 *
YAMAJI T ET AL: "AN OFFSET-COMPENSATED CMOS PROGRAMMABLE GAIN AMPLIFIER", IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS, COMMUNICATIONS AND COMPUTER SCIENCES, INSTITUTE OF ELECTRONICS INFORMATION AND COMM. ENG. TOKYO, JP, vol. E80-A, no. 2, 1 February 1997 (1997-02-01), pages 353 - 355, XP000752170, ISSN: 0916-8508 *

Also Published As

Publication number Publication date
WO2003003568A2 (en) 2003-01-09

Similar Documents

Publication Publication Date Title
WO2002097974A3 (en) Active auto zero circuit for time continuous open loop amplifiers
US10749479B2 (en) Amplification systems and methods with distortion reductions
US20030006920A1 (en) Comparator with offset canceling function and D/A conversion apparatus with offset canceling function
WO2002103375A3 (en) Integrated power detector with temperature compensation
EP1225690A3 (en) Transmitter circuits
WO2003030373A1 (en) Delta-sigma modulation apparatus and signal amplification apparatus
WO2006127855A3 (en) Fast setting, low noise, low offset operational amplifier and method
EP0526241B1 (en) Linear compensating circuit
WO2002013377A3 (en) A switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current
US7342454B2 (en) Analog multistage amplification circuit in the field of sensor
EP1271868A3 (en) Burst mode receiving apparatus having offset compensating function and data recovery method thereof
WO2002019517A3 (en) Power amplifier saturation detection and compensation
EP1788700B8 (en) Method for double sampling loop negative feedback and double sampling negative feedback amplifier
EP1193861A3 (en) Feedforward amplifier
KR20010039821A (en) Adaptive gain and/or phase adjustment control system and method
CA2288460A1 (en) Distortion compensation circuit
WO2003003568A3 (en) Active auto zero circuit for programmable time continuous open loop amplifiers
WO2002052720A3 (en) Circuit for low noise, fully differential amplification
US7633343B2 (en) Fully differential amplifier
CA2379300A1 (en) Feedforward amplifier
US6741131B2 (en) DC-compensation loop for variable gain amplifier
EP1665462B1 (en) Amplifier power control in frequency hopping applications and methods
WO2007078519A3 (en) Fully differential amplifier with continuous-time offset reduction
WO2013093989A1 (en) Amplification circuit
JP2001156566A (en) Gain control circuit

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): CN JP KR

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
ENP Entry into the national phase

Ref document number: 2004114989

Country of ref document: RU

Kind code of ref document: A

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP