EP1250759A4 - Band pass filter from two filters - Google Patents
Band pass filter from two filtersInfo
- Publication number
- EP1250759A4 EP1250759A4 EP00986432A EP00986432A EP1250759A4 EP 1250759 A4 EP1250759 A4 EP 1250759A4 EP 00986432 A EP00986432 A EP 00986432A EP 00986432 A EP00986432 A EP 00986432A EP 1250759 A4 EP1250759 A4 EP 1250759A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- filters
- pass filter
- band pass
- band
- filter
- 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.)
- Withdrawn
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
- H03H11/1295—Parallel-T 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
- H03H11/12—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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/04—Recursive filters
-
- 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
- H03H19/004—Switched capacitor networks
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US491998 | 1990-03-12 | ||
US09/491,998 US6492865B1 (en) | 1999-12-17 | 2000-01-26 | Band pass filter from two filters |
PCT/US2000/034077 WO2001056157A1 (en) | 2000-01-26 | 2000-12-15 | Band pass filter from two filters |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1250759A1 EP1250759A1 (en) | 2002-10-23 |
EP1250759A4 true EP1250759A4 (en) | 2004-12-15 |
Family
ID=23954533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00986432A Withdrawn EP1250759A4 (en) | 2000-01-26 | 2000-12-15 | Band pass filter from two filters |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1250759A4 (en) |
WO (1) | WO2001056157A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1274184C (en) * | 2001-09-21 | 2006-09-06 | 西门子公司 | Method and apparatus for controlling bass reproduction of audio frequency signal in electroacoustic transducer |
EP1326334A3 (en) * | 2002-01-04 | 2004-08-18 | Siemens Gebäudesicherheit GmbH & Co. OHG | Active RC-filtercircuit |
TWI420326B (en) * | 2007-05-31 | 2013-12-21 | Min Syong Lin | A single frequency and band pass filter |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999056339A1 (en) * | 1998-04-30 | 1999-11-04 | The Governement Of The United States Of America As Represented By The Secretary Of The Navy | Microwave channelized bandpass filter having two channels |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE48278C (en) * | 1970-07-17 | E. CA-REZ in Brüssel, Nr. 72 Rue du Marais | Innovation in the process for the preparation of ammonium nitrate by reacting barium nitrate with ammonium sulfate | |
US4984292A (en) * | 1988-09-28 | 1991-01-08 | Correpro (Canada) Inc. | Bandpass amplifier and receiver using bandpass amplifier |
US5930374A (en) * | 1996-10-17 | 1999-07-27 | Aphex Systems, Ltd. | Phase coherent crossover |
US6020783A (en) * | 1998-06-05 | 2000-02-01 | Signal Technology Corporation | RF notch filter having multiple notch and variable notch frequency characteristics |
-
2000
- 2000-12-15 WO PCT/US2000/034077 patent/WO2001056157A1/en not_active Application Discontinuation
- 2000-12-15 EP EP00986432A patent/EP1250759A4/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999056339A1 (en) * | 1998-04-30 | 1999-11-04 | The Governement Of The United States Of America As Represented By The Secretary Of The Navy | Microwave channelized bandpass filter having two channels |
Non-Patent Citations (2)
Title |
---|
M. GILISSEN: "Filtre passe-bande à haute séliectivité avec réjection de bruit.", ELECTRONIQUE ET APPLICATIONS INDUSTRIELLES., no. 262s, January 1979 (1979-01-01), FRSOCIETE DES EDITIONS RADIO. PARIS., pages 41 - 43, XP002301087 * |
See also references of WO0156157A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1250759A1 (en) | 2002-10-23 |
WO2001056157A1 (en) | 2001-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20020809 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7H 03K 5/00 A Ipc: 7H 03H 11/12 B |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20041028 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20050331 |