DE3789571T2 - Elektrisches Filter. - Google Patents

Elektrisches Filter.

Info

Publication number
DE3789571T2
DE3789571T2 DE3789571T DE3789571T DE3789571T2 DE 3789571 T2 DE3789571 T2 DE 3789571T2 DE 3789571 T DE3789571 T DE 3789571T DE 3789571 T DE3789571 T DE 3789571T DE 3789571 T2 DE3789571 T2 DE 3789571T2
Authority
DE
Germany
Prior art keywords
electric filter
filter
electric
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE3789571T
Other languages
English (en)
Other versions
DE3789571D1 (de
Inventor
John Barry Hughes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE3789571D1 publication Critical patent/DE3789571D1/de
Application granted granted Critical
Publication of DE3789571T2 publication Critical patent/DE3789571T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/24—Continuous tuning of more than one resonant circuit simultaneously, the circuits being tuned to substantially the same frequency, e.g. for single-knob tuning
DE3789571T 1986-04-30 1987-04-23 Elektrisches Filter. Expired - Fee Related DE3789571T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8610561A GB2190255B (en) 1986-04-30 1986-04-30 Electrical filter

Publications (2)

Publication Number Publication Date
DE3789571D1 DE3789571D1 (de) 1994-05-19
DE3789571T2 true DE3789571T2 (de) 1994-10-20

Family

ID=10597111

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3789571T Expired - Fee Related DE3789571T2 (de) 1986-04-30 1987-04-23 Elektrisches Filter.

Country Status (5)

Country Link
US (1) US4785253A (de)
EP (1) EP0244020B1 (de)
JP (1) JP2628644B2 (de)
DE (1) DE3789571T2 (de)
GB (1) GB2190255B (de)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624325A1 (fr) * 1987-12-03 1989-06-09 Applic Electro Tech Avance Amplificateur correcteur, en particulier pour liaisons numeriques en bande de base a haut debit
US4868516A (en) * 1988-04-14 1989-09-19 John Fluke Mfg. Co., Inc. Alternating current amplifier with digitally controlled frequency response
US5392456A (en) * 1989-10-06 1995-02-21 Hitachi, Ltd. Method of controlling filter time constant and filter circuit having the time constant control function based on the method
JPH03219719A (ja) * 1990-01-24 1991-09-27 Mitsubishi Electric Corp 遅延回路及びそれを用いた半導体装置
JPH04148562A (ja) * 1990-10-12 1992-05-21 Kawasaki Steel Corp 集積回路
US5164620A (en) * 1991-11-26 1992-11-17 Kalaf Thomas R Autonomous gain normalization circuit
US5331218A (en) * 1992-07-13 1994-07-19 Allegro Microsystems, Inc. Switched-capacitor notch filter with programmable notch width and depth
US5663675A (en) * 1995-06-07 1997-09-02 American Microsystems, Inc. Multiple stage tracking filter using a self-calibrating RC oscillator circuit
GB9704719D0 (en) * 1997-03-07 1997-04-23 Plessey Semiconductors Ltd Frequency tracking arrangements
US6181218B1 (en) * 1998-05-19 2001-01-30 Conexant Systems, Inc. High-linearity, low-spread variable capacitance array
GB9916901D0 (en) * 1999-07-19 1999-09-22 Cambridge Silicon Radio Ltd Adjustable filter
US6696892B1 (en) 1999-11-11 2004-02-24 Broadcom Corporation Large dynamic range programmable gain attenuator
US6680640B1 (en) 1999-11-11 2004-01-20 Broadcom Corporation High linearity large bandwidth, switch insensitive, programmable gain attenuator
US6731160B1 (en) * 1999-11-11 2004-05-04 Broadcom Corporation Adjustable bandwidth high pass filter for large input signal, low supply voltage applications
US6472940B1 (en) * 1999-11-11 2002-10-29 Broadcom Corporation Gigabit ethernet transceiver with analog front end
US6630860B1 (en) 2000-09-20 2003-10-07 Applied Micro Circuits Corporation Programmable phase locked-loop filter architecture for a range selectable bandwidth
US6452444B1 (en) 2001-02-13 2002-09-17 Analog Devices, Inc. Method and apparatus for background calibration of active RC filters
CN1572107A (zh) * 2001-10-16 2005-01-26 Rf信息公司 在单片集成电路中实现接收机功能的方法与装置
US6646498B2 (en) * 2001-12-18 2003-11-11 Texas Instruments Incorporated High frequency tunable filter
US7199844B2 (en) * 2002-05-28 2007-04-03 Rfstream Corporation Quadratic nyquist slope filter
US7116961B2 (en) * 2002-05-29 2006-10-03 Rfstream Corporation Image rejection quadratic filter
EP1532736A1 (de) * 2002-05-29 2005-05-25 Ukom, Inc. Vefahren und vorrichtungen zur abstimmung unter verwendung der sukzessiven aproximation
US6882245B2 (en) * 2002-06-05 2005-04-19 Rf Stream Corporation Frequency discrete LC filter bank
EP1514345A2 (de) * 2002-06-05 2005-03-16 Rfstream Corporation Quadratur-demodulator unter verwendung eines basisband-nyquist-filters
JP2004172911A (ja) * 2002-11-19 2004-06-17 Matsushita Electric Ind Co Ltd フィルタ装置
DE10321200B3 (de) * 2003-05-12 2005-02-03 Infineon Technologies Ag Einrichtung und Verfahren zur Kalibrierung von R/C-Filterschaltungen
US6940365B2 (en) * 2003-07-18 2005-09-06 Rfstream Corporation Methods and apparatus for an improved discrete LC filter
US7212068B2 (en) * 2004-04-02 2007-05-01 Integration Associates Inc. Tunable Sallen-Key filter stage and filter assembly
WO2006099072A2 (en) * 2005-03-11 2006-09-21 Rfstream Corporation Radio frequency inductive-capacitive filter circuit topology
WO2006099161A2 (en) 2005-03-11 2006-09-21 Rfstream Corporation A mosfet temperature compensation current source
JP2008085454A (ja) * 2006-09-26 2008-04-10 Nec Electronics Corp 半導体集積回路装置
GB0802660D0 (en) * 2008-02-13 2008-03-19 Nokia Corp An oscillator
US9143172B2 (en) 2009-06-03 2015-09-22 Qualcomm Incorporated Tunable matching circuits for power amplifiers
US8963611B2 (en) 2009-06-19 2015-02-24 Qualcomm Incorporated Power and impedance measurement circuits for a wireless communication device
US8072272B2 (en) 2009-08-19 2011-12-06 Qualcomm, Incorporated Digital tunable inter-stage matching circuit
JP2011114622A (ja) * 2009-11-27 2011-06-09 Panasonic Corp フィルタ自動調整回路及び方法並びに無線通信装置
US8791767B2 (en) * 2010-10-29 2014-07-29 Qualcomm Incorporated Package inductance compensating tunable capacitor circuit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185246A (en) * 1978-02-27 1980-01-22 Schlumberger Technology Corporation Circuit for reducing transients by precharging capacitors
JPS5646316A (en) * 1979-09-21 1981-04-27 Hitachi Ltd Programmable capacitance
JPS56109022A (en) * 1980-02-01 1981-08-29 Toshiba Corp Automatic adjuster of tuning circuit
JPS5918421A (ja) * 1982-07-22 1984-01-30 Oval Eng Co Ltd 帯域自動追従フイルタ
JPS60126908A (ja) * 1983-12-13 1985-07-06 Sony Corp フイルタ装置
JPS60130912A (ja) * 1983-12-20 1985-07-12 Sony Corp フイルタ装置
JPS60214617A (ja) * 1984-04-11 1985-10-26 Hitachi Ltd フイルタ集積回路
NL8401370A (nl) * 1984-05-01 1985-12-02 Philips Nv Filterschakeling.
JPS6188333U (de) * 1984-11-13 1986-06-09
JPS61276408A (ja) * 1985-05-31 1986-12-06 Hitachi Ltd フイルタ回路

Also Published As

Publication number Publication date
DE3789571D1 (de) 1994-05-19
GB2190255B (en) 1989-11-29
EP0244020A2 (de) 1987-11-04
GB8610561D0 (en) 1986-06-04
GB2190255A (en) 1987-11-11
EP0244020B1 (de) 1994-04-13
JPS62262508A (ja) 1987-11-14
US4785253A (en) 1988-11-15
JP2628644B2 (ja) 1997-07-09
EP0244020A3 (en) 1989-08-02

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8327 Change in the person/name/address of the patent owner

Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V., EINDHOVEN, N

8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee