WO2004021251A3 - Switched capacitor system, method, and use - Google Patents

Switched capacitor system, method, and use Download PDF

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Publication number
WO2004021251A3
WO2004021251A3 PCT/US2003/026198 US0326198W WO2004021251A3 WO 2004021251 A3 WO2004021251 A3 WO 2004021251A3 US 0326198 W US0326198 W US 0326198W WO 2004021251 A3 WO2004021251 A3 WO 2004021251A3
Authority
WO
WIPO (PCT)
Prior art keywords
amplifier
input voltage
capacitor
clock phase
sampled
Prior art date
Application number
PCT/US2003/026198
Other languages
French (fr)
Other versions
WO2004021251A2 (en
Inventor
Patrick J Quinn
Original Assignee
Xilinx Inc
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 US10/232,113 external-priority patent/US6727749B1/en
Priority claimed from US10/231,541 external-priority patent/US6784824B1/en
Application filed by Xilinx Inc filed Critical Xilinx Inc
Priority to JP2004532939A priority Critical patent/JP4454498B2/en
Priority to EP03791719A priority patent/EP1540565B1/en
Priority to CA2494264A priority patent/CA2494264C/en
Publication of WO2004021251A2 publication Critical patent/WO2004021251A2/en
Publication of WO2004021251A3 publication Critical patent/WO2004021251A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/14—Arrangements for performing computing operations, e.g. operational amplifiers for addition or subtraction 
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06J—HYBRID COMPUTING ARRANGEMENTS
    • G06J1/00—Hybrid computing arrangements

Abstract

An apparatus and method for adding input voltage signals. First 206 and second 208 input voltage signals are respectively sampled onto first 218 and second 228 capacitors during a first clock phase 202. In response to a second clock phase 204, the first sampled input voltage 206 that is held on the first capacitor 218 is coupled to the negative input terminal 236 of an amplifier 230, and the second sampled voltage 208 held on the second capacitor 228 is coupled to the positive terminal 240 of the amplifier 230. A feedback voltage is provided from the amplifier output 216 to the negative amplifier input 236 via the first capacitor 218 during the second clock phase 204. The first 206 and second 208 input voltage signals are added at the amplifier 230 during the second clock phase 204 to output 216 the sum in response to the sampled input voltage signals and the output feedback, whereby the resulting transfer function is independent of capacitor mismatch and non-linearity.
PCT/US2003/026198 2002-08-29 2003-08-20 Switched capacitor system, method, and use WO2004021251A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2004532939A JP4454498B2 (en) 2002-08-29 2003-08-20 Switched capacitor systems, methods and uses
EP03791719A EP1540565B1 (en) 2002-08-29 2003-08-20 Switched capacitor system, method, and use
CA2494264A CA2494264C (en) 2002-08-29 2003-08-20 Switched capacitor system, method, and use

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/232,113 US6727749B1 (en) 2002-08-29 2002-08-29 Switched capacitor summing system and method
US10/231,541 2002-08-29
US10/231,541 US6784824B1 (en) 2002-08-29 2002-08-29 Analog-to-digital converter which is substantially independent of capacitor mismatch
US10/232,113 2002-08-29

Publications (2)

Publication Number Publication Date
WO2004021251A2 WO2004021251A2 (en) 2004-03-11
WO2004021251A3 true WO2004021251A3 (en) 2004-06-17

Family

ID=31980956

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/026198 WO2004021251A2 (en) 2002-08-29 2003-08-20 Switched capacitor system, method, and use

Country Status (4)

Country Link
EP (1) EP1540565B1 (en)
JP (1) JP4454498B2 (en)
CA (1) CA2494264C (en)
WO (1) WO2004021251A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4654998B2 (en) * 2005-11-08 2011-03-23 株式会社デンソー Sample hold circuit and multiple D / A converter
JP5155103B2 (en) * 2008-11-05 2013-02-27 旭化成エレクトロニクス株式会社 Switched capacitor circuit and pipelined A / D converter
US8648779B2 (en) 2009-10-20 2014-02-11 Taiwan Semiconductor Manufacturing Co., Ltd. LCD driver
US8339302B2 (en) 2010-07-29 2012-12-25 Freescale Semiconductor, Inc. Analog-to-digital converter having a comparator for a multi-stage sampling circuit and method therefor
CN102654987B (en) * 2012-02-03 2014-10-15 京东方科技集团股份有限公司 Thin film transistor liquid crystal display (TFT-LCD) substrate pixel point charging method, device and source driver
KR101876605B1 (en) * 2014-10-30 2018-07-11 한국과학기술원 Optical spectroscopy system using pipeline matched filter and dual slope analog digital converter and control method thereof
US10714185B2 (en) * 2018-10-24 2020-07-14 Micron Technology, Inc. Event counters for memory operations
US11061100B2 (en) 2019-06-12 2021-07-13 Texas Instruments Incorporated System for continuous calibration of hall sensors
US11867773B2 (en) 2019-06-18 2024-01-09 Texas Instruments Incorporated Switched capacitor integrator circuit with reference, offset cancellation and differential to single-ended conversion
TWI768976B (en) * 2021-06-21 2022-06-21 瑞昱半導體股份有限公司 Switched capacitor amplifier apparatus having gain adjustment mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6137321A (en) * 1999-01-12 2000-10-24 Qualcomm Incorporated Linear sampling switch
US6362770B1 (en) * 2000-09-12 2002-03-26 Motorola, Inc. Dual input switched capacitor gain stage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6137321A (en) * 1999-01-12 2000-10-24 Qualcomm Incorporated Linear sampling switch
US6362770B1 (en) * 2000-09-12 2002-03-26 Motorola, Inc. Dual input switched capacitor gain stage

Also Published As

Publication number Publication date
JP2005537749A (en) 2005-12-08
EP1540565B1 (en) 2012-01-18
EP1540565A2 (en) 2005-06-15
WO2004021251A2 (en) 2004-03-11
CA2494264C (en) 2011-07-26
CA2494264A1 (en) 2004-03-11
JP4454498B2 (en) 2010-04-21

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