DE69428224D1 - Schmalbandiges Filter mit variabler Zentralfrequenz - Google Patents

Schmalbandiges Filter mit variabler Zentralfrequenz

Info

Publication number: DE69428224D1
Authority: DE; Germany
Prior art keywords: narrow band; band filter; central frequency; variable central; variable
Prior art date: 1993-02-10
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

DE69428224T

Other languages

English (en)

Other versions

DE69428224T2 (de

Inventor

Masaki Ichihara

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.)

NEC Corp

Original Assignee

NEC 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.)

1993-02-10

Filing date

1994-02-09

Publication date

2001-10-18

1994-02-09 Application filed by NEC Corp filed Critical NEC Corp

2001-10-18 Publication of DE69428224D1 publication Critical patent/DE69428224D1/de

2002-04-18 Application granted granted Critical

2002-04-18 Publication of DE69428224T2 publication Critical patent/DE69428224T2/de

2014-02-10 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H19/00—Networks using time-varying elements, e.g. N-path filters
- H03H19/002—N-path filters

DE69428224T 1993-02-10 1994-02-09 Schmalbandiges Filter mit variabler Zentralfrequenz Expired - Fee Related DE69428224T2 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP5022211A JPH0738567B2 (ja)	1993-02-10	1993-02-10	狭帯域フィルタ

Publications (2)

Publication Number	Publication Date
DE69428224D1 true DE69428224D1 (de)	2001-10-18
DE69428224T2 DE69428224T2 (de)	2002-04-18

Family

ID=12076471

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE69428224T Expired - Fee Related DE69428224T2 (de)	1993-02-10	1994-02-09	Schmalbandiges Filter mit variabler Zentralfrequenz

Country Status (6)

Country	Link
US (1)	US5491453A (de)
EP (1)	EP0610911B1 (de)
JP (1)	JPH0738567B2 (de)
AU (1)	AU675470B2 (de)
CA (1)	CA2115182C (de)
DE (1)	DE69428224T2 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3043680B2 (ja) *	1997-10-27	2000-05-22	日本電気アイシーマイコンシステム株式会社	半導体記憶回路
US6185264B1 (en) *	1997-12-17	2001-02-06	Ove Kris Gashus	Apparatus and method for frequency shift keying
US6947893B1 (en) *	1999-11-19	2005-09-20	Nippon Telegraph & Telephone Corporation	Acoustic signal transmission with insertion signal for machine control
EP1806842B1 (de) *	2005-12-30	2009-09-02	Stmicroelectronics SA	Schaltkreis eines Transkonduktanzfilters, insbesondere für ein Mobiltelefon
GB2500057A (en) *	2012-03-09	2013-09-11	Renesas Mobile Corp	An N-path filter with variable N
US9136815B2 (en) *	2012-06-13	2015-09-15	Nokia Technologies Oy	Methods and apparatuses for implementing variable bandwidth RF tracking filters for reconfigurable multi-standard radios
US9136825B2 (en) *	2012-06-13	2015-09-15	Nokia Technologies Oy	Method and device for implementing tracking filters and RF front end of software defined radios
US9407482B2 (en) *	2013-11-11	2016-08-02	Nokia Technologies Oy	Tunable RF N-path filter
WO2019000075A1 (en) *	2017-06-30	2019-01-03	Transfert Plus	SYSTEMS AND METHODS FOR ULTRA-WIDE BAND PULSE RADIO WITH LOW POWER CONSUMPTION
CN112119588A (zh) *	2018-05-18	2020-12-22	华为技术有限公司	一种改进带外抑制的n路滤波器
US11329355B2 (en) *	2019-12-27	2022-05-10	Northeastern University	Reconfigurable filter based on commutation of single frequency resonators
DE102021004785B4 (de)	2021-04-28	2023-09-07	Georg Figol	N-Pfad Filter als Zwischenfrequenz- und Frequenzumsetzer-Stufe eines Superhet Empfängers
WO2023238768A1 (ja) *	2022-06-10	2023-12-14	株式会社村田製作所	Ｎパスフィルタ
WO2023238767A1 (ja) *	2022-06-10	2023-12-14	株式会社村田製作所	Ｎパスフィルタ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3803357A (en) *	1971-06-30	1974-04-09	J Sacks	Noise filter
US4502049A (en) *	1982-08-30	1985-02-26	Itec, Inc.	Universal signalling tone receiver
JPH04219786A (ja) *	1990-12-20	1992-08-10	Sony Corp	周波数判別回路
JPH04294412A (ja) *	1991-03-22	1992-10-19	Oki Electric Ind Co Ltd	カウンタ回路

1993
- 1993-02-10 JP JP5022211A patent/JPH0738567B2/ja not_active Expired - Fee Related
1994
- 1994-02-08 CA CA002115182A patent/CA2115182C/en not_active Expired - Fee Related
- 1994-02-08 AU AU54983/94A patent/AU675470B2/en not_active Ceased
- 1994-02-09 EP EP94101975A patent/EP0610911B1/de not_active Expired - Lifetime
- 1994-02-09 DE DE69428224T patent/DE69428224T2/de not_active Expired - Fee Related
- 1994-02-10 US US08/194,316 patent/US5491453A/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
CA2115182A1 (en)	1994-08-11
EP0610911B1 (de)	2001-09-12
AU675470B2 (en)	1997-02-06
CA2115182C (en)	1997-05-27
EP0610911A2 (de)	1994-08-17
JPH0738567B2 (ja)	1995-04-26
AU5498394A (en)	1994-08-18
DE69428224T2 (de)	2002-04-18
JPH06237149A (ja)	1994-08-23
EP0610911A3 (en)	1996-03-13
US5491453A (en)	1996-02-13

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Legal Events

Date	Code	Title	Description
2002-10-10	8364	No opposition during term of opposition
2006-12-14	8339	Ceased/non-payment of the annual fee