CA2017926A1 - Filtres actifs d'ordre deux - Google Patents

Filtres actifs d'ordre deux

Info

Publication number
CA2017926A1
CA2017926A1 CA2017926A CA2017926A CA2017926A1 CA 2017926 A1 CA2017926 A1 CA 2017926A1 CA 2017926 A CA2017926 A CA 2017926A CA 2017926 A CA2017926 A CA 2017926A CA 2017926 A1 CA2017926 A1 CA 2017926A1
Authority
CA
Canada
Prior art keywords
reactance
potential divider
pass
amplifier
terminal
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
CA2017926A
Other languages
English (en)
Other versions
CA2017926C (fr
Inventor
Petre Popescu
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of CA2017926A1 publication Critical patent/CA2017926A1/fr
Application granted granted Critical
Publication of CA2017926C publication Critical patent/CA2017926C/fr
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
    • H03H11/1217—Frequency selective two-port networks using amplifiers with feedback using a plurality of operational amplifiers

Landscapes

  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)
CA002017926A 1989-12-14 1990-05-30 Filtres actifs d'ordre deux Expired - Fee Related CA2017926C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US450,790 1989-12-14
US07/450,790 US5006810A (en) 1989-12-14 1989-12-14 Second order active filters

Publications (2)

Publication Number Publication Date
CA2017926A1 true CA2017926A1 (fr) 1991-06-14
CA2017926C CA2017926C (fr) 1993-11-16

Family

ID=23789491

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002017926A Expired - Fee Related CA2017926C (fr) 1989-12-14 1990-05-30 Filtres actifs d'ordre deux

Country Status (2)

Country Link
US (1) US5006810A (fr)
CA (1) CA2017926C (fr)

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151662A (en) * 1991-06-24 1992-09-29 Motorola, Inc. Circuit and method of signal differentiation
US5694439A (en) * 1995-03-21 1997-12-02 Intel Corporation Bi-directional low pass filtering method and apparatus
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US7321735B1 (en) 1998-10-21 2008-01-22 Parkervision, Inc. Optical down-converter using universal frequency translation technology
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US7006805B1 (en) 1999-01-22 2006-02-28 Parker Vision, Inc. Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6873836B1 (en) 1999-03-03 2005-03-29 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US7110435B1 (en) 1999-03-15 2006-09-19 Parkervision, Inc. Spread spectrum applications of universal frequency translation
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US7065162B1 (en) * 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7072390B1 (en) 1999-08-04 2006-07-04 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US7054296B1 (en) 1999-08-04 2006-05-30 Parkervision, Inc. Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
US7082171B1 (en) 1999-11-24 2006-07-25 Parkervision, Inc. Phase shifting applications of universal frequency translation
US6963734B2 (en) 1999-12-22 2005-11-08 Parkervision, Inc. Differential frequency down-conversion using techniques of universal frequency translation technology
US7292835B2 (en) 2000-01-28 2007-11-06 Parkervision, Inc. Wireless and wired cable modem applications of universal frequency translation technology
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7554508B2 (en) 2000-06-09 2009-06-30 Parker Vision, Inc. Phased array antenna applications on universal frequency translation
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US7010559B2 (en) 2000-11-14 2006-03-07 Parkervision, Inc. Method and apparatus for a parallel correlator and applications thereof
US6541977B2 (en) * 2001-02-13 2003-04-01 Pulsar 2000, Inc. Electronic water line tracer
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7085335B2 (en) 2001-11-09 2006-08-01 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US6975848B2 (en) 2002-06-04 2005-12-13 Parkervision, Inc. Method and apparatus for DC offset removal in a radio frequency communication channel
US7321640B2 (en) 2002-06-07 2008-01-22 Parkervision, Inc. Active polyphase inverter filter for quadrature signal generation
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
TWI280690B (en) * 2003-03-18 2007-05-01 Tdk Corp Electronic device for wireless communications and reflector device for wireless communication cards
US7639071B2 (en) * 2006-11-30 2009-12-29 Zyion, Inc. Active LC band pass filter
WO2008146365A1 (fr) * 2007-05-29 2008-12-04 Fujitsu Limited Contrôleur et dispositif de stockage
WO2021183936A1 (fr) * 2020-03-13 2021-09-16 Netcom Inc. Filtre à syntonisation multiple et commande associée

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413722A (en) * 1973-01-17 1975-11-12 Post Office Filter networks
CA1101101A (fr) * 1977-07-11 1981-05-12 Westinghouse Canada Limited Traduction non-disponible
US4594648A (en) * 1984-11-28 1986-06-10 Venus Scientific Inc. Wide frequency band coupling network for an active ripple and noise filter

Also Published As

Publication number Publication date
US5006810A (en) 1991-04-09
CA2017926C (fr) 1993-11-16

Similar Documents

Publication Publication Date Title
CA2017926A1 (fr) Filtres actifs d'ordre deux
EP0396123A3 (fr) Filtre passe-bande à plusieurs étages reliés en parallèle
EP0836278A3 (fr) Dispositif de filtrage à ondes élastiques de surface
AU1843400A (en) Electrically tunable filters with dielectric varactors
JPS63197109A (ja) 消散低域フィルタ
CA2115182A1 (fr) Filtre a bande etroite a frequence centrale variable
CA2231789A1 (fr) Circuit amplificateur a configuration programmable
US5157362A (en) Narrow band notch filter with extended passband
GB2235821A (en) Integrated circuit and its connecting circuit
CA1226631A (fr) Impedance capacitive complexe
US5264805A (en) Amplifier for limiter
US4303889A (en) Filter circuit
CA2017927A1 (fr) Filtres actifs d'ordre deux
EP0281371A3 (fr) Filtre passe-bande
EP0637189A2 (fr) Circuit de traitement de signal audio
CA2266941A1 (fr) Filtre cote charge pour circuit de conversion
ATE291793T1 (de) Künstliche leitung
GB1371343A (en) Filter circuit with gyrators and capacitors
JPS61227414A (ja) 帯域可変フイルタ
JPH0370414U (fr)
RU99115770A (ru) Электрическая схема для помехоустойчивой обработки сигналов
EP1003285A2 (fr) Filtre d'intensité sonore
JPH0635543Y2 (ja) イコライザ回路
HK59691A (en) Electrical signal filters
EP0734119A3 (fr) Circuit attenuateur utilisant une ligne quart-d'onde

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed