ES529138A0 - Filtro activo sintonizable - Google Patents

Filtro activo sintonizable

Info

Publication number
ES529138A0
ES529138A0 ES529138A ES529138A ES529138A0 ES 529138 A0 ES529138 A0 ES 529138A0 ES 529138 A ES529138 A ES 529138A ES 529138 A ES529138 A ES 529138A ES 529138 A0 ES529138 A0 ES 529138A0
Authority
ES
Spain
Prior art keywords
active filter
tunable active
tunable
filter
active
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.)
Granted
Application number
ES529138A
Other languages
English (en)
Other versions
ES8501584A1 (es
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.)
AT&T Inc
Original Assignee
Western Electric Co 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
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES8501584A1 publication Critical patent/ES8501584A1/es
Publication of ES529138A0 publication Critical patent/ES529138A0/es
Granted 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
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • 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
    • H03H11/1291—Current or voltage controlled filters
ES529138A 1983-01-27 1984-01-25 Filtro activo sintonizable Granted ES529138A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/461,532 US4509019A (en) 1983-01-27 1983-01-27 Tunable active filter

Publications (2)

Publication Number Publication Date
ES8501584A1 ES8501584A1 (es) 1984-12-16
ES529138A0 true ES529138A0 (es) 1984-12-16

Family

ID=23832940

Family Applications (1)

Application Number Title Priority Date Filing Date
ES529138A Granted ES529138A0 (es) 1983-01-27 1984-01-25 Filtro activo sintonizable

Country Status (9)

Country Link
US (1) US4509019A (es)
EP (1) EP0134221B1 (es)
JP (1) JPH0720042B2 (es)
KR (1) KR910001630B1 (es)
CA (1) CA1206543A (es)
DE (1) DE3381389D1 (es)
ES (1) ES529138A0 (es)
IT (1) IT1173506B (es)
WO (1) WO1984003009A1 (es)

Families Citing this family (64)

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US6313687B1 (en) 1960-08-17 2001-11-06 Agere Systems Guardian Corp. Variable impedance circuit
JPS59105706A (ja) * 1982-12-10 1984-06-19 Toshiba Corp 差動増幅回路
JPS60214617A (ja) * 1984-04-11 1985-10-26 Hitachi Ltd フイルタ集積回路
US4656436A (en) * 1985-12-31 1987-04-07 At&T Bell Laboratories CMOS transconductance circuit with triode mode input
US4710726A (en) * 1986-02-27 1987-12-01 Columbia University In The City Of New York Semiconductive MOS resistance network
NL8602893A (nl) * 1986-11-14 1988-06-01 Philips Nv Filterschakeling.
NL8602894A (nl) * 1986-11-14 1988-06-01 Philips Nv Filterschakeling.
EP0345880B1 (en) * 1988-06-08 1995-04-12 Koninklijke Philips Electronics N.V. Balanced integrator-filter arrangement
US4918338A (en) * 1988-10-04 1990-04-17 North American Philips Corporation Drain-biassed transresistance device for continuous time filters
US5063356A (en) * 1989-09-29 1991-11-05 U.S. Philips Corporation Balanced filter circuit having a controllable balanced current multiplier
DE69018187T2 (de) * 1989-10-03 1995-11-02 Philips Electronics Nv Gegentakt-Filterschaltung.
US5006733A (en) * 1990-05-11 1991-04-09 Northern Telecom Limited Filter control circuit
US5124593A (en) * 1990-09-26 1992-06-23 National Semiconductor Corporation Continuous-time filter tuning circuit and method
JP2520055B2 (ja) * 1991-04-10 1996-07-31 東光株式会社 有極型リ−プフロッグ・フィルタ
US5345119A (en) * 1992-09-16 1994-09-06 At&T Bell Laboratories Continuous-time filter tuning with a delay-locked-loop in mass storage systems or the like
US5327302A (en) * 1992-09-16 1994-07-05 At&T Bell Laboratories Data filter tuning for constant density recording applications
US5508570A (en) * 1993-01-27 1996-04-16 Micro Linear Corporation Differential amplifier based integrator having a left-half plane pole
US5412346A (en) * 1993-12-13 1995-05-02 At&T Corp. Variable gain voltage signal amplifier
JP2809994B2 (ja) 1994-09-29 1998-10-15 財団法人工業技術研究院 完全に差動的な非演算増幅器に基づく正帰還形のバイポーラ接合形トランジスタバイクワッドフィルタ
US5608796A (en) * 1995-02-10 1997-03-04 Lucent Technologies Inc. Balanced phase splitting circuit
EP0897612A2 (en) * 1997-02-07 1999-02-24 Koninklijke Philips Electronics N.V. Transistorized two-port variable-conductance network
DE19837574A1 (de) 1998-08-19 2000-02-24 Philips Corp Intellectual Pty Aktive elektronische Filterschaltung
US8744384B2 (en) 2000-07-20 2014-06-03 Blackberry Limited Tunable microwave devices with auto-adjusting matching circuit
WO2002035756A2 (en) * 2000-10-27 2002-05-02 The Trustees Of Columbia University In The City Of New York Active continuous-time filter with increased dynamic range in the presence of blocker signals
WO2002056558A2 (en) * 2001-01-10 2002-07-18 Univ Columbia Active filter circuit with dynamically modifiable internal gain
US6452444B1 (en) 2001-02-13 2002-09-17 Analog Devices, Inc. Method and apparatus for background calibration of active RC filters
US6646509B2 (en) 2002-01-23 2003-11-11 Broadcom Corporation Layout technique for matched resistors on an integrated circuit substrate
US6806765B2 (en) * 2002-07-24 2004-10-19 Oki America, Inc. Method and apparatus for checking the response of a transconductance- capacitance filter
JP4098701B2 (ja) * 2002-12-27 2008-06-11 株式会社東芝 可変時定数回路及びこれを用いたフィルタ回路
US6995606B2 (en) * 2004-05-27 2006-02-07 Allegro Microsystems, Inc. High pass filter using insulated gate field effect transistors
US7049875B2 (en) * 2004-06-10 2006-05-23 Theta Microelectronics, Inc. One-pin automatic tuning of MOSFET resistors
TWI345873B (en) * 2004-09-03 2011-07-21 Rohm Co Ltd Balanced output circuit and electronic machine using the same
US7230476B1 (en) * 2005-01-18 2007-06-12 Inphi Corporation Bipolar high impedance element
US9406444B2 (en) 2005-11-14 2016-08-02 Blackberry Limited Thin film capacitors
US7711337B2 (en) 2006-01-14 2010-05-04 Paratek Microwave, Inc. Adaptive impedance matching module (AIMM) control architectures
US7535312B2 (en) 2006-11-08 2009-05-19 Paratek Microwave, Inc. Adaptive impedance matching apparatus, system and method with improved dynamic range
US7714676B2 (en) 2006-11-08 2010-05-11 Paratek Microwave, Inc. Adaptive impedance matching apparatus, system and method
JP4820764B2 (ja) * 2007-01-19 2011-11-24 パナソニック株式会社 利得制御フィルタ装置、利得制御複素フィルタ装置および受信装置
US7917104B2 (en) 2007-04-23 2011-03-29 Paratek Microwave, Inc. Techniques for improved adaptive impedance matching
US8213886B2 (en) 2007-05-07 2012-07-03 Paratek Microwave, Inc. Hybrid techniques for antenna retuning utilizing transmit and receive power information
KR100881918B1 (ko) * 2007-06-07 2009-02-06 삼성전자주식회사 고차의 저주파 필터링 회로 및 그 방법
US7991363B2 (en) 2007-11-14 2011-08-02 Paratek Microwave, Inc. Tuning matching circuits for transmitter and receiver bands as a function of transmitter metrics
US8072285B2 (en) 2008-09-24 2011-12-06 Paratek Microwave, Inc. Methods for tuning an adaptive impedance matching network with a look-up table
US8472888B2 (en) 2009-08-25 2013-06-25 Research In Motion Rf, Inc. Method and apparatus for calibrating a communication device
US9026062B2 (en) 2009-10-10 2015-05-05 Blackberry Limited Method and apparatus for managing operations of a communication device
US8803631B2 (en) 2010-03-22 2014-08-12 Blackberry Limited Method and apparatus for adapting a variable impedance network
CN102948083B (zh) 2010-04-20 2015-05-27 黑莓有限公司 通信设备中管理干扰的方法和装置
US9379454B2 (en) 2010-11-08 2016-06-28 Blackberry Limited Method and apparatus for tuning antennas in a communication device
US8712340B2 (en) 2011-02-18 2014-04-29 Blackberry Limited Method and apparatus for radio antenna frequency tuning
US8655286B2 (en) 2011-02-25 2014-02-18 Blackberry Limited Method and apparatus for tuning a communication device
US8594584B2 (en) 2011-05-16 2013-11-26 Blackberry Limited Method and apparatus for tuning a communication device
WO2013022826A1 (en) 2011-08-05 2013-02-14 Research In Motion Rf, Inc. Method and apparatus for band tuning in a communication device
US8948889B2 (en) 2012-06-01 2015-02-03 Blackberry Limited Methods and apparatus for tuning circuit components of a communication device
US9853363B2 (en) 2012-07-06 2017-12-26 Blackberry Limited Methods and apparatus to control mutual coupling between antennas
US9246223B2 (en) 2012-07-17 2016-01-26 Blackberry Limited Antenna tuning for multiband operation
US9350405B2 (en) * 2012-07-19 2016-05-24 Blackberry Limited Method and apparatus for antenna tuning and power consumption management in a communication device
US9413066B2 (en) 2012-07-19 2016-08-09 Blackberry Limited Method and apparatus for beam forming and antenna tuning in a communication device
US9362891B2 (en) 2012-07-26 2016-06-07 Blackberry Limited Methods and apparatus for tuning a communication device
US9374113B2 (en) 2012-12-21 2016-06-21 Blackberry Limited Method and apparatus for adjusting the timing of radio antenna tuning
US10404295B2 (en) 2012-12-21 2019-09-03 Blackberry Limited Method and apparatus for adjusting the timing of radio antenna tuning
JP6358267B2 (ja) * 2013-12-27 2018-07-18 株式会社ソシオネクスト 積分器、デルタシグマ変調器および通信装置
US9438319B2 (en) 2014-12-16 2016-09-06 Blackberry Limited Method and apparatus for antenna selection
TWI653823B (zh) * 2017-11-14 2019-03-11 Realtek Semiconductor Corporation 主動式負載產生電路及應用其之濾波器
WO2020084401A1 (en) * 2018-10-26 2020-04-30 Sendyne Corporation Improved runtime-calibratable analog computing system and methods of use

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1172506A (en) * 1966-12-15 1969-12-03 Bradley Ltd G & E Improvements in operational amplifier circuits
US3747007A (en) * 1972-07-07 1973-07-17 Us Army Variable compensation for feedback control systems
US4329599A (en) * 1980-05-29 1982-05-11 American Microsystems, Inc. Switched-capacitor cosine filter
US4356451A (en) * 1980-06-16 1982-10-26 Wilson Harold E Active band pass filter

Also Published As

Publication number Publication date
WO1984003009A1 (en) 1984-08-02
IT8419318A0 (it) 1984-01-25
CA1206543A (en) 1986-06-24
EP0134221A4 (en) 1986-04-15
EP0134221A1 (en) 1985-03-20
DE3381389D1 (de) 1990-05-03
ES8501584A1 (es) 1984-12-16
KR910001630B1 (ko) 1991-03-16
US4509019A (en) 1985-04-02
KR840007322A (ko) 1984-12-06
JPH0720042B2 (ja) 1995-03-06
EP0134221B1 (en) 1990-03-28
IT1173506B (it) 1987-06-24
JPS60500395A (ja) 1985-03-22

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20020629