TW349264B - Method and device for continuous-time filtering - Google Patents

Method and device for continuous-time filtering

Info

Publication number
TW349264B
TW349264B TW086108310A TW86108310A TW349264B TW 349264 B TW349264 B TW 349264B TW 086108310 A TW086108310 A TW 086108310A TW 86108310 A TW86108310 A TW 86108310A TW 349264 B TW349264 B TW 349264B
Authority
TW
Taiwan
Prior art keywords
continuous
time filtering
capacitance
pole frequency
digital cmos
Prior art date
Application number
TW086108310A
Other languages
Chinese (zh)
Inventor
Nian-Xiong Tan
Original Assignee
Ericsson Telefon Ab L M
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
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of TW349264B publication Critical patent/TW349264B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H03F3/345—DC amplifiers in which all stages are DC-coupled with semiconductor devices only with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/0422—Frequency selective two-port networks using transconductance amplifiers, e.g. gmC filters
    • H03H11/0427—Filters using a single transconductance amplifier; Filters derived from a single transconductor filter, e.g. by element substitution, cascading, parallel connection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/331—Sigma delta modulation being used in an amplifying circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Networks Using Active Elements (AREA)
  • Amplifiers (AREA)

Abstract

A method for continuous-time filtering in a digital CMOS process, which is characterized in using current mirrors to produce continuous-time filters in digital CMOS processes, the pole frequency being determined by the transconductance of an MOS transistor and the capacitance of a capacitor seen at its gate; in which the capacitance defining the pole frequency can be in any form, including a capacitor outside a chip.
TW086108310A 1996-07-19 1997-06-16 Method and device for continuous-time filtering TW349264B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9602824A SE508697C2 (en) 1996-07-19 1996-07-19 Method and apparatus for time continuous filtration in digital CMOS process

Publications (1)

Publication Number Publication Date
TW349264B true TW349264B (en) 1999-01-01

Family

ID=20403437

Family Applications (1)

Application Number Title Priority Date Filing Date
TW086108310A TW349264B (en) 1996-07-19 1997-06-16 Method and device for continuous-time filtering

Country Status (10)

Country Link
EP (1) EP0913029A1 (en)
JP (1) JP2000514980A (en)
KR (1) KR20000065251A (en)
CN (1) CN1108658C (en)
AU (1) AU3563797A (en)
CA (1) CA2260915A1 (en)
HK (1) HK1021595A1 (en)
SE (1) SE508697C2 (en)
TW (1) TW349264B (en)
WO (1) WO1998004038A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011004512A1 (en) * 2009-07-08 2011-01-13 パナソニック株式会社 Filter circuit and optical disc device provided with same
US8502597B2 (en) * 2009-10-21 2013-08-06 Qualcomm, Incorporated Low-pass filter design
US20140010783A1 (en) 2012-07-06 2014-01-09 Hoffmann-La Roche Inc. Antiviral compounds
KR20150109451A (en) 2013-01-23 2015-10-01 에프. 호프만-라 로슈 아게 Antiviral triazole derivatives
RU2015136256A (en) 2013-03-05 2017-04-10 Ф. Хоффманн-Ля Рош Аг ANTI-VIRAL COMPOUNDS
CN104679095A (en) * 2015-02-15 2015-06-03 格科微电子（上海）有限公司 Current source, current source array, read-out circuit, control method of read-out circuit and amplification circuit
US11296678B1 (en) * 2020-12-29 2022-04-05 Qualcomm Incorporated Complementary current-mode biquad with high linearity

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4839542A (en) * 1984-08-21 1989-06-13 General Datacomm Industries, Inc. Active transconductance filter device
US4686487A (en) * 1986-07-28 1987-08-11 Commodore Business Machines, Inc. Current mirror amplifier
EP0600141B1 (en) * 1992-10-30 1997-03-05 SGS-THOMSON MICROELECTRONICS S.p.A. Transconductor stage
WO1995006977A1 (en) * 1993-09-02 1995-03-09 National Semiconductor Corporation Active impedance termination

Also Published As

Publication number Publication date
JP2000514980A (en) 2000-11-07
WO1998004038A1 (en) 1998-01-29
EP0913029A1 (en) 1999-05-06
HK1021595A1 (en) 2000-06-16
SE9602824L (en) 1998-01-20
CN1225759A (en) 1999-08-11
SE9602824D0 (en) 1996-07-19
SE508697C2 (en) 1998-10-26
KR20000065251A (en) 2000-11-06
AU3563797A (en) 1998-02-10
CN1108658C (en) 2003-05-14
CA2260915A1 (en) 1998-01-29

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees