BR9106178A - ACTIVE FILTER CIRCUIT - Google Patents

ACTIVE FILTER CIRCUIT

Info

Publication number: BR9106178A
Authority: BR; Brazil
Prior art keywords: filter circuit; active filter; active; circuit; filter
Prior art date: 1990-10-10

Application number

BR919106178A

Other languages

Portuguese (pt)

Inventor

Joseph P Heck

Barry L Jason

Original Assignee

Motorola Inc

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.)

1990-10-10

Filing date

1991-08-19

Publication date

1993-03-16

1991-08-19 Application filed by Motorola Inc filed Critical Motorola Inc

1993-03-16 Publication of BR9106178A publication Critical patent/BR9106178A/en

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
- H03D7/163—Multiple-frequency-changing all the frequency changers being connected in cascade the local oscillations of at least two of the frequency changers being derived from a single oscillator
- 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
- H03H11/0444—Simulation of ladder networks
- H03H11/045—Leapfrog structures

Landscapes

Engineering & Computer Science (AREA)
Power Engineering (AREA)
Networks Using Active Elements (AREA)
Transmitters (AREA)
Noise Elimination (AREA)
Mobile Radio Communication Systems (AREA)

BR919106178A 1990-10-10 1991-08-19 ACTIVE FILTER CIRCUIT BR9106178A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US59506290A	1990-10-10	1990-10-10
PCT/US1991/005876 WO1992007422A1 (en)	1990-10-10	1991-08-19	Active filter circuit

Publications (1)

Publication Number	Publication Date
BR9106178A true BR9106178A (en)	1993-03-16

Family

ID=24381563

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BR919106178A BR9106178A (en)	1990-10-10	1991-08-19	ACTIVE FILTER CIRCUIT

Country Status (8)

Country	Link
JP (1)	JPH05503409A (en)
AR (1)	AR246644A1 (en)
BR (1)	BR9106178A (en)
CA (1)	CA2069639A1 (en)
DE (1)	DE4192545T (en)
GB (2)	GB2255461B (en)
MX (1)	MX9101511A (en)
WO (1)	WO1992007422A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
SE9703944L (en) *	1997-10-29	1999-04-30	Ericsson Telefon Ab L M	Radio communication device and method
US6489847B1 (en)	2000-01-28	2002-12-03	Telefonaktiebolaget Lm Ericsson	Low distoration driving amplifier for integrated filters
GB2394133A (en) *	2002-10-17	2004-04-14	Toumaz Technology Ltd	Radio receiver with reconfigurable filtering arrangement

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB491693A (en) *	1937-01-21	1938-09-07	Hazeltine Corp	Improvements in variable selectivity radio receivers
GB856892A (en) *	1957-11-14	1960-12-21	Collins Radio Co	Means for reducing the threshold of angular-modulation receivers
US3805091A (en) *	1972-06-15	1974-04-16	Arp Instr	Frequency sensitive circuit employing variable transconductance circuit
US4374335A (en) *	1980-05-19	1983-02-15	Precision Monolithics, Inc.	Tuneable I.C. active integrator
US4356657A (en) *	1981-02-11	1982-11-02	Adolph E. Goldfarb	Toy car wash apparatus and method
US4356658A (en) *	1981-02-11	1982-11-02	Goldfarb Adolph E	Multiple and varied motion stage apparatus for doll figure
CA1190289A (en) *	1981-04-28	1985-07-09	Nippon Hoso Kyokai	Fm signal demodulation system
US4531148A (en) *	1981-08-31	1985-07-23	Oki Electric Industry Co., Ltd.	High sensitivity FM signal demodulation system
WO1983000974A1 (en) *	1981-08-31	1983-03-17	Ohta, Tomozo	High-sensitivity fm demodulating system
IT1212744B (en) *	1983-05-19	1989-11-30	Sogs Ates Componenti Elettroni	CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER.
US4591805A (en) *	1984-05-30	1986-05-27	General Electric Company	Adaptive bandwidth amplifier
US4839542A (en) *	1984-08-21	1989-06-13	General Datacomm Industries, Inc.	Active transconductance filter device
DE3737581A1 (en) *	1987-11-05	1989-05-18	Grundig Emv	DEVICE FOR AUTOMATICALLY APPLYING THE BALANCING VOLTAGE TO THE TUNABLE SWITCHING ELEMENTS OF THE ZF AMPLIFIER OF A TELEVISION RECEIVER
JPH02186723A (en) *	1988-08-25	1990-07-23	Nec Corp	Receiver
US5051628A (en) *	1990-01-02	1991-09-24	Motorola, Inc.	Integrated filter circuit

1991
- 1991-08-19 DE DE19914192545 patent/DE4192545T/de not_active Ceased
- 1991-08-19 GB GB9212049A patent/GB2255461B/en not_active Expired - Fee Related
- 1991-08-19 JP JP3518332A patent/JPH05503409A/en active Pending
- 1991-08-19 GB GB9503349A patent/GB2284718A/en not_active Withdrawn
- 1991-08-19 BR BR919106178A patent/BR9106178A/en unknown
- 1991-08-19 WO PCT/US1991/005876 patent/WO1992007422A1/en not_active Ceased
- 1991-08-19 CA CA 2069639 patent/CA2069639A1/en not_active Abandoned
- 1991-09-11 AR AR32063991A patent/AR246644A1/en active
- 1991-10-10 MX MX9101511A patent/MX9101511A/en unknown

Also Published As

Publication number	Publication date
GB2284718A (en)	1995-06-14
GB2255461B (en)	1995-06-14
CA2069639A1 (en)	1992-04-11
GB9212049D0 (en)	1992-08-12
MX9101511A (en)	1992-06-05
WO1992007422A1 (en)	1992-04-30
GB2255461A (en)	1992-11-04
GB9503349D0 (en)	1995-04-12
AR246644A1 (en)	1994-08-31
JPH05503409A (en)	1993-06-03
DE4192545T (en)	1992-10-08

Publication	Publication Date	Title
DE69123611D1 (en)	1997-01-30	Active filter
DE69122459D1 (en)	1996-11-07	filter
FI931506A0 (en)	1993-04-02	FILTER FOER FILTRERING AV VAETSKOR
DE59108986D1 (en)	1998-06-18	UNIVERSAL FILTER
DE69129666D1 (en)	1998-07-30	Electrete filter
DE69028869D1 (en)	1996-11-21	Active filter circuit
MX9100133A (en)	1992-10-01	CIRCUIT PROVISION.
DK0680295T3 (en)	2000-03-27	Ostomy filter
BR9105769A (en)	1993-02-02	FILTER SET
BR8901529A (en)	1989-11-14	CIRCUIT SET
DE69127390D1 (en)	1997-10-02	Optical low pass filter
DE69125363D1 (en)	1997-04-30	SELF-HEATING FILTER
NO914874D0 (en)	1991-12-11	FILTER ELEMENT
FI932303L (en)	1993-05-19	Filter system
DE69221551D1 (en)	1997-09-18	Integrating filter circuit
KR930702052A (en)	1993-09-08	filter
DE69125273D1 (en)	1997-04-24	DIELECTRIC FILTER
BR9106178A (en)	1993-03-16	ACTIVE FILTER CIRCUIT
IT9067404A0 (en)	1990-06-05	circuit
BR9205557A (en)	1994-04-26	Filter circuit, and filter
DE59209816D1 (en)	2000-04-13	Active harmonic filter
ATA186891A (en)	1992-07-15	FILTER DEVICE
IT9021806A0 (en)	1990-10-19	DEVOLTOR SUPERVOLTOR CIRCUIT
ATA119690A (en)	1991-05-15	FILTER ARRANGEMENT
FI905194A7 (en)	1992-04-23	Filter

Legal Events

Date	Code	Title	Description
1998-12-29	KF	Request for proof of payment of annual fee
2000-05-16	FD5	Application fees: dismissal - article 86 of industrial property law