DE69123611T2 - Aktiver Filter - Google Patents

Aktiver Filter

Info

Publication number: DE69123611T2
Authority: DE; Germany
Prior art keywords: active filter; filter; active
Prior art date: 1990-02-14
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

DE69123611T

Other languages

English (en)

Other versions

DE69123611D1 (de

Inventor

Hideyuki Hagino

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.)

Toshiba Corp

Original Assignee

Toshiba Corp

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.)

1990-02-14

Filing date

1991-02-14

Publication date

1997-05-15

1991-02-14 Application filed by Toshiba Corp filed Critical Toshiba Corp

1997-01-30 Publication of DE69123611D1 publication Critical patent/DE69123611D1/de

1997-05-15 Application granted granted Critical

1997-05-15 Publication of DE69123611T2 publication Critical patent/DE69123611T2/de

2011-02-15 Anticipated expiration legal-status Critical

Status 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
- 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

DE69123611T 1990-02-14 1991-02-14 Aktiver Filter Expired - Fee Related DE69123611T2 (de)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number	Publication Date
DE69123611D1 DE69123611D1 (de)	1997-01-30
DE69123611T2 true DE69123611T2 (de)	1997-05-15

Family

ID=12366102

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE69123611T Expired - Fee Related DE69123611T2 (de)	1990-02-14	1991-02-14	Aktiver Filter

Country Status (5)

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

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
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
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
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
US6061555A (en)	1998-10-21	2000-05-09	Parkervision, Inc.	Method and system for ensuring reception of a communications signal
US6370371B1 (en)	1998-10-21	2002-04-09	Parkervision, Inc.	Applications of universal frequency translation
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
US6542722B1 (en)	1998-10-21	2003-04-01	Parkervision, Inc.	Method and system for frequency up-conversion with variety of transmitter configurations
US7236754B2 (en)	1999-08-23	2007-06-26	Parkervision, Inc.	Method and system for frequency up-conversion
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
US6049706A (en)	1998-10-21	2000-04-11	Parkervision, Inc.	Integrated frequency translation and selectivity
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
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
US7065162B1 (en)	1999-04-16	2006-06-20	Parkervision, Inc.	Method and system for down-converting an electromagnetic signal, and transforms for same
US7693230B2 (en)	1999-04-16	2010-04-06	Parkervision, Inc.	Apparatus and method of differential IQ frequency up-conversion
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
US8295406B1 (en)	1999-08-04	2012-10-23	Parkervision, Inc.	Universal platform module for a plurality of communication protocols
US7010286B2 (en) *	2000-04-14	2006-03-07	Parkervision, Inc.	Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7454453B2 (en)	2000-11-14	2008-11-18	Parkervision, Inc.	Methods, systems, and computer program products for parallel correlation and applications thereof
US7072427B2 (en)	2001-11-09	2006-07-04	Parkervision, Inc.	Method and apparatus for reducing DC offsets in a communication system
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

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

1990
- 1990-02-14 JP JP2032699A patent/JPH063861B2/ja not_active Expired - Lifetime
1991
- 1991-02-13 US US07/655,547 patent/US5124592A/en not_active Expired - Fee Related
- 1991-02-13 KR KR1019910002454A patent/KR950010479B1/ko not_active IP Right Cessation
- 1991-02-14 DE DE69123611T patent/DE69123611T2/de not_active Expired - Fee Related
- 1991-02-14 EP EP91102092A patent/EP0442492B1/de not_active Expired - Lifetime

Also Published As

Publication number	Publication date
EP0442492A3 (en)	1991-12-27
US5124592A (en)	1992-06-23
JPH063861B2 (ja)	1994-01-12
JPH03259611A (ja)	1991-11-19
EP0442492A2 (de)	1991-08-21
KR910016139A (ko)	1991-09-30
DE69123611D1 (de)	1997-01-30
EP0442492B1 (de)	1996-12-18
KR950010479B1 (ko)	1995-09-18

Legal Events

Date	Code	Title
1998-01-22	8364	No opposition during term of opposition
1999-04-29	8320	Willingness to grant licences declared (paragraph 23)
2004-12-09	8339	Ceased/non-payment of the annual fee

Publication	Publication Date	Title
DE69123611T2 (de)	1997-05-15	Aktiver Filter
DE69122459D1 (de)	1996-11-07	Filter
NO930993D0 (no)	1993-03-18	Filter for vaeskefiltrering
DE69129666T2 (de)	1998-12-10	Elektrete Filter
FI932661A (fi)	1993-12-12	Vaerme- och fuktvaexlande filter
NO924907D0 (no)	1992-12-18	Filtreringssikt
NO924929D0 (no)	1992-12-18	Farmasoeytisk aktive benzoquinazolinforbindelser
BR9105769A (pt)	1993-02-02	Conjunto de filtro
DE69308410D1 (de)	1997-04-10	Filter
DE69022837T2 (de)	1996-03-14	Aktives Filter.
NO914874L (no)	1992-06-15	Filterelement
FI934732A0 (fi)	1993-10-26	Dielektrisk filter
DE69327991D1 (de)	2000-04-13	Filter
KR930702052A (ko)	1993-09-08	필 터
FI921025A (fi)	1993-09-10	Suodatin
DE69103326D1 (de)	1994-09-15	Filteranordnungen.
DE59209816D1 (de)	2000-04-13	Aktives Oberwellenfilter
BR9106178A (pt)	1993-03-16	Circuito de filtro ativo
ATA119690A (de)	1991-05-15	Filteranordnung
DK125890D0 (da)	1990-05-21	Filter
NO173217C (no)	1993-11-17	Marint filter
ATA186891A (de)	1992-07-15	Filtervorrichtung
DK35790D0 (da)	1990-02-12	Direct filter immunotechnique
SE9301074D0 (sv)	1993-03-31	Aktivt filter
BR7000927U (pt)	1991-11-26	Filtro esterilizador