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KR910016139A - 액티브필터 - Google Patents

액티브필터 Download PDF

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Publication number
KR910016139A
KR910016139A KR1019910002454A KR910002454A KR910016139A KR 910016139 A KR910016139 A KR 910016139A KR 1019910002454 A KR1019910002454 A KR 1019910002454A KR 910002454 A KR910002454 A KR 910002454A KR 910016139 A KR910016139 A KR 910016139A
Authority
KR
South Korea
Prior art keywords
signal
output
differential amplifier
active filter
current differential
Prior art date
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Granted
Application number
KR1019910002454A
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English (en)
Other versions
KR950010479B1 (ko
Inventor
히데유키 하기노
Original Assignee
아오이 죠이치
가부시키가이샤 도시바
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Filing date
Publication date
Application filed by 아오이 죠이치, 가부시키가이샤 도시바 filed Critical 아오이 죠이치
Publication of KR910016139A publication Critical patent/KR910016139A/ko
Application granted granted Critical
Publication of KR950010479B1 publication Critical patent/KR950010479B1/ko
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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

Landscapes

  • Networks Using Active Elements (AREA)

Abstract

내용 없음

Description

액티브필터
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 1실시예에 따른 액티브필터의 등가회로도.

Claims (1)

  1. 제1입력단자에 입력신호가 공급되고 제2입력단자로 출력신호가 귀환되는 전류차동앰프(11)와, 상기 전류차동앰프(11)의 제1출력단자와 제1전원과의 사이에 삽입되고 그 전류차동앰프의 전류차에 따라 전하가 출력되는 용량소자(Co) 및, 상기 입력신호의 임의의 레벨과 상기 전류차동앰프(11)의 출력단자로 부터의 신호를 각각 저항소자로 분압하여 상기 출력신호가 가산하는 신호가산수단(12)을 구비한 것을 특징으로 하는 액티브필터.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019910002454A 1990-02-14 1991-02-13 액티브필터 Expired - Fee Related KR950010479B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2032699A JPH063861B2 (ja) 1990-02-14 1990-02-14 アクティブ・フィルタ
JP02-032699 1990-02-14

Publications (2)

Publication Number Publication Date
KR910016139A true KR910016139A (ko) 1991-09-30
KR950010479B1 KR950010479B1 (ko) 1995-09-18

Family

ID=12366102

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910002454A Expired - Fee Related KR950010479B1 (ko) 1990-02-14 1991-02-13 액티브필터

Country Status (5)

Country Link
US (1) US5124592A (ko)
EP (1) EP0442492B1 (ko)
JP (1) JPH063861B2 (ko)
KR (1) KR950010479B1 (ko)
DE (1) DE69123611T2 (ko)

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JP2714269B2 (ja) * 1991-04-30 1998-02-16 三洋電機株式会社 等価インダクタンス回路
JP2840490B2 (ja) * 1991-11-29 1998-12-24 三菱電機株式会社 アクティブフィルタ回路
US5397927A (en) * 1992-08-25 1995-03-14 Helionetics, Inc. Active filter for reducing non-fundamental currents and voltages
US5614770A (en) * 1994-06-06 1997-03-25 Helionetics, Inc. Structure and method for performing active injection mode filtering on an AC power system
JPH0936702A (ja) * 1995-07-20 1997-02-07 Nippon Motorola Ltd アクティブロ−パスフィルタ
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
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
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US7321735B1 (en) 1998-10-21 2008-01-22 Parkervision, Inc. Optical down-converter using universal frequency translation technology
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
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
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
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter 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
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
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using 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
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
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
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
US7072390B1 (en) 1999-08-04 2006-07-04 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
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
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
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54160150A (en) * 1978-06-09 1979-12-18 Nippon Gakki Seizo Kk Frequency selecting circuit
JPS60111515A (ja) * 1983-11-21 1985-06-18 Sony Corp ｎ次フイルタ装置
JPH0648771B2 (ja) * 1985-03-26 1994-06-22 ソニー株式会社 イコライザ回路
JPS6294003A (ja) * 1985-10-21 1987-04-30 Hitachi Ltd 複合形の広帯域バツフア増巾器
JPH0828644B2 (ja) * 1986-12-26 1996-03-21 株式会社東芝 アクテイブ型位相等化器
JP2542634B2 (ja) * 1987-09-08 1996-10-09 株式会社東芝 アクティブフィルタ型信号調整回路
FR2622752B1 (fr) * 1987-10-30 1990-02-23 Labo Electronique Physique Circuit formant un filtre actif r.c. pour application coupe-bande

Also Published As

Publication number Publication date
EP0442492A2 (en) 1991-08-21
JPH03259611A (ja) 1991-11-19
EP0442492B1 (en) 1996-12-18
DE69123611T2 (de) 1997-05-15
EP0442492A3 (en) 1991-12-27
KR950010479B1 (ko) 1995-09-18
US5124592A (en) 1992-06-23
JPH063861B2 (ja) 1994-01-12
DE69123611D1 (de) 1997-01-30

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