DE69226862D1 - Frequenzabstimmungssystem für ein Paar C-Transkonduktanzoperationsverstärker - Google Patents
Frequenzabstimmungssystem für ein Paar C-TranskonduktanzoperationsverstärkerInfo
- Publication number
- DE69226862D1 DE69226862D1 DE69226862T DE69226862T DE69226862D1 DE 69226862 D1 DE69226862 D1 DE 69226862D1 DE 69226862 T DE69226862 T DE 69226862T DE 69226862 T DE69226862 T DE 69226862T DE 69226862 D1 DE69226862 D1 DE 69226862D1
- Authority
- DE
- Germany
- Prior art keywords
- pair
- operational amplifiers
- frequency tuning
- tuning system
- transconductance operational
- 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.)
- Expired - Fee Related
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
- H03H11/0422—Frequency selective two-port networks using transconductance amplifiers, e.g. gmC filters
- H03H11/0472—Current or voltage controlled filters
-
- 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
- H03H11/0433—Two integrator loop filters
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92202293A EP0579876B1 (de) | 1992-07-24 | 1992-07-24 | Frequenzabstimmungssystem für ein Paar C-Transkonduktanzoperationsverstärker |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69226862D1 true DE69226862D1 (de) | 1998-10-08 |
DE69226862T2 DE69226862T2 (de) | 1999-01-21 |
Family
ID=8210807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69226862T Expired - Fee Related DE69226862T2 (de) | 1992-07-24 | 1992-07-24 | Frequenzabstimmungssystem für ein Paar C-Transkonduktanzoperationsverstärker |
Country Status (6)
Country | Link |
---|---|
US (1) | US5440264A (de) |
EP (1) | EP0579876B1 (de) |
JP (1) | JP3316038B2 (de) |
DE (1) | DE69226862T2 (de) |
ES (1) | ES2123538T3 (de) |
FI (1) | FI108585B (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3208975B2 (ja) * | 1993-12-28 | 2001-09-17 | 株式会社日立製作所 | アクティブフィルタ制御方式 |
US5625317A (en) * | 1994-08-08 | 1997-04-29 | Texas Instruments Incorporated | Tuning method for integrated continuous-time filters |
EP0726652B1 (de) * | 1995-02-10 | 2001-10-17 | Alcatel | Linearer abstimmbarer Gm-C Integrator |
US5650747A (en) * | 1995-10-05 | 1997-07-22 | Chen; Xiaole | Circuit technique for implementing programmable zeros in high speed CMOS filters |
GB2307626B (en) * | 1995-11-24 | 2000-06-07 | Nokia Mobile Phones Ltd | A signal receiver |
KR100187200B1 (ko) * | 1996-07-12 | 1999-04-15 | 김광호 | 트랜스 컨덕턴스를 이용한 차단 주파수 안정화 장치 |
US6266522B1 (en) | 1998-02-04 | 2001-07-24 | Ericsson Inc. | Apparatus and methods for tuning bandpass filters |
US6310512B1 (en) | 1999-11-22 | 2001-10-30 | Cardiac Pacemakers, Inc. | Integrated self-adjustable continuous time band pass filter based upon Gm cell with bipolar transistors |
US6287263B1 (en) | 1999-02-08 | 2001-09-11 | Cardiac Pacemakers, Inc. | System for processing bursted amplitude modulated signals using an impedance sensor |
WO2000045890A1 (en) * | 1999-02-08 | 2000-08-10 | Cardiac Pacemakers, Inc. | Signal processing system using improved transconductance cell |
US6137375A (en) * | 1999-05-28 | 2000-10-24 | The Trustees Of Columbia University In The City Of New York | Loss control loop circuit for controlling the output voltage of a voltage-controlled oscillator |
US6954774B1 (en) * | 2001-12-20 | 2005-10-11 | Rockwell Collins | Bandpass filter with ability to tune a pass frequency, passband gain and filter Q |
US6600373B1 (en) | 2002-07-31 | 2003-07-29 | Agere Systems, Inc. | Method and circuit for tuning a transconductance amplifier |
US6917252B1 (en) | 2003-04-28 | 2005-07-12 | Adam S. Wyszynski | Fully integrated automatically-tuned RF and IF active bandpass filters |
US7486338B1 (en) | 2003-04-28 | 2009-02-03 | Wyszynski Adam S | Fully integrated terrestrial TV tuner architecture |
US7098731B1 (en) * | 2004-01-13 | 2006-08-29 | Wyszynski Adam S | Synthesis method for an active polyphase filter |
US7400212B1 (en) | 2005-06-07 | 2008-07-15 | Vishinsky Adam S | Self-tuned active bandpass filters |
FR2892872B1 (fr) * | 2005-11-02 | 2008-01-04 | Atmel Corp | Filtre passe-bande complexe |
US7463086B2 (en) * | 2006-11-17 | 2008-12-09 | O2Micro International Ltd. | Apparatus and method for tuning a band pass filter |
US7622991B2 (en) * | 2007-08-22 | 2009-11-24 | Don Roy Sauer | Transconductance signal capacity format |
US8390371B2 (en) * | 2010-07-30 | 2013-03-05 | Tialinx, Inc. | Tunable transconductance-capacitance filter with coefficients independent of variations in process corner, temperature, and input supply voltage |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528040A (en) * | 1968-12-12 | 1970-09-08 | Aerospace Res | Electronically variable filter |
US4340868A (en) * | 1980-05-12 | 1982-07-20 | Motorola, Inc. | Current mode biquadratic active filter |
NL8401370A (nl) * | 1984-05-01 | 1985-12-02 | Philips Nv | Filterschakeling. |
JPH0648775B2 (ja) * | 1989-05-24 | 1994-06-22 | 東光株式会社 | リープフロッグ・フィルタ |
US5117205A (en) * | 1990-05-01 | 1992-05-26 | U.S. Philips Corporation | Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits |
JPH04211508A (ja) * | 1990-06-15 | 1992-08-03 | Toshiba Corp | 積分回路 |
US5124593A (en) * | 1990-09-26 | 1992-06-23 | National Semiconductor Corporation | Continuous-time filter tuning circuit and method |
-
1992
- 1992-07-24 ES ES92202293T patent/ES2123538T3/es not_active Expired - Lifetime
- 1992-07-24 DE DE69226862T patent/DE69226862T2/de not_active Expired - Fee Related
- 1992-07-24 EP EP92202293A patent/EP0579876B1/de not_active Expired - Lifetime
-
1993
- 1993-07-22 FI FI933310A patent/FI108585B/fi active
- 1993-07-26 JP JP18421293A patent/JP3316038B2/ja not_active Expired - Fee Related
-
1994
- 1994-12-07 US US08/350,705 patent/US5440264A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2123538T3 (es) | 1999-01-16 |
EP0579876B1 (de) | 1998-09-02 |
US5440264A (en) | 1995-08-08 |
FI933310A (fi) | 1994-01-25 |
DE69226862T2 (de) | 1999-01-21 |
EP0579876A1 (de) | 1994-01-26 |
FI933310A0 (fi) | 1993-07-22 |
JPH06164312A (ja) | 1994-06-10 |
JP3316038B2 (ja) | 2002-08-19 |
FI108585B (fi) | 2002-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: ALCATEL, PARIS, FR |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |