SE9602824L - Method and apparatus for time continuous filtration in digital cmos process - Google Patents

Method and apparatus for time continuous filtration in digital cmos process

Info

Publication number
SE9602824L
SE9602824L SE9602824A SE9602824A SE9602824L SE 9602824 L SE9602824 L SE 9602824L SE 9602824 A SE9602824 A SE 9602824A SE 9602824 A SE9602824 A SE 9602824A SE 9602824 L SE9602824 L SE 9602824L
Authority
SE
Sweden
Prior art keywords
digital cmos
cmos process
time filters
continuous
proposed
Prior art date
Application number
SE9602824A
Other languages
Swedish (sv)
Other versions
SE9602824D0 (en
SE508697C2 (en
Inventor
Nianxiong 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
Priority to SE9602824A priority Critical patent/SE508697C2/en
Publication of SE9602824D0 publication Critical patent/SE9602824D0/en
Priority to TW086108310A priority patent/TW349264B/en
Priority to PCT/SE1997/001169 priority patent/WO1998004038A1/en
Priority to JP10506853A priority patent/JP2000514980A/en
Priority to CN97196552A priority patent/CN1108658C/en
Priority to KR1019980710778A priority patent/KR20000065251A/en
Priority to CA002260915A priority patent/CA2260915A1/en
Priority to EP97932096A priority patent/EP0913029A1/en
Priority to AU35637/97A priority patent/AU3563797A/en
Publication of SE9602824L publication Critical patent/SE9602824L/en
Publication of SE508697C2 publication Critical patent/SE508697C2/en
Priority to HK00100431A priority patent/HK1021595A1/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

In a digital CMOS process neither resistors nor linear capacitors are available and it is not possible or simply not practical to design continuous-time filters using traditional methods. It has therefore been proposed to utilize current mirrors to realize filtering functions in a voltage-to-current converter when designing continuous-time filters for sampled data systems in digital CMOS processes. The pole frequency is therefore determined by the transconductance of an MOS transistor (6) and the capacitance of a capacitor (8) seen at its gate. In this application, a generalized method of designing continuous-time filters in digital CMOS process and methods of cascading have been proposed to reduce the spread of the pole frequencies.
SE9602824A 1996-07-19 1996-07-19 Method and apparatus for time continuous filtration in digital CMOS process SE508697C2 (en)

Priority Applications (10)

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
TW086108310A TW349264B (en) 1996-07-19 1997-06-16 Method and device for continuous-time filtering
AU35637/97A AU3563797A (en) 1996-07-19 1997-06-27 A method and device for continuous-time filtering in digital cmos process
CN97196552A CN1108658C (en) 1996-07-19 1997-06-27 Method and device for continuous-time filtering in digital CMOS process
JP10506853A JP2000514980A (en) 1996-07-19 1997-06-27 Method and apparatus for continuous time filtering in a digital CMOS process
PCT/SE1997/001169 WO1998004038A1 (en) 1996-07-19 1997-06-27 A method and device for continuous-time filtering in digital cmos process
KR1019980710778A KR20000065251A (en) 1996-07-19 1997-06-27 Method and apparatus for temporally continuous filtering in a digital CMS process
CA002260915A CA2260915A1 (en) 1996-07-19 1997-06-27 A method and device for continuous-time filtering in digital cmos process
EP97932096A EP0913029A1 (en) 1996-07-19 1997-06-27 A method and device for continuous-time filtering in digital cmos process
HK00100431A HK1021595A1 (en) 1996-07-19 2000-01-22 A device for continuous-time filtering in digital cmos process

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 (3)

Publication Number Publication Date
SE9602824D0 SE9602824D0 (en) 1996-07-19
SE9602824L true SE9602824L (en) 1998-01-20
SE508697C2 SE508697C2 (en) 1998-10-26

Family

ID=20403437

Family Applications (1)

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

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
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
TW349264B (en) 1999-01-01
CA2260915A1 (en) 1998-01-29

Similar Documents

Publication Publication Date Title
Lee et al. A continuous-time current-mode integrator
CA1159909A (en) Switched-capacitor interpolation filter
Nagaraj A parasitic-insensitive area-efficient approach to realizing very large time constants in switched-capacitor circuits
Groenewold Optimal dynamic range integrators
JPH04282912A (en) Continuous time filter tuned circuit and method
KR930702818A (en) Universal filter
Liu et al. New current-feedback amplifier-based universal biquadratic filter
SE9602824L (en) Method and apparatus for time continuous filtration in digital cmos process
Young et al. Analog NMOS sampled-data recursive filter
SE9903161L (en) Construction of digital filters
EP0383300A3 (en) LC-type dielectric filter
JPH0211172B2 (en)
DE69628070T2 (en) Controllable filter arrangement
KR940004956A (en) Duty cycle control circuit
JPS54118148A (en) Comparator circuit
DE19841677A1 (en) Integrated active integrator filter circuit
Sotner et al. Design of integer/fractional-order filter with electronically reconfigurable transfer response
GB2189960A (en) Switching scheme for switched capacitor filters
Raut Wideband CMOS transconductor for analog VLSI systems
FI900803A0 (en) KOPPLINGSANORDNING FOER FOERENING AV RF-FOERSTAERKARE OCH DRIFTSPAENNINGSFILTER.
Haigh et al. High frequency switched capacitor filters for CMOS technology
WO2006054213A3 (en) Apparatus for filtering a reference voltage and mobile phones comprising such apparatus
Steyaert et al. A high performance RDS-detector for low voltage applications
Young MOS switched-capacitor analog sampled-data recursive filters
Sabadell et al. Continuous-Time 4th Order Butterworth Low-Pass Filter for Video Frequency Applications

Legal Events

Date Code Title Description
NUG Patent has lapsed