DE4192545T - - Google Patents

Info

Publication number
DE4192545T
DE4192545T DE19914192545 DE4192545T DE4192545T DE 4192545 T DE4192545 T DE 4192545T DE 19914192545 DE19914192545 DE 19914192545 DE 4192545 T DE4192545 T DE 4192545T DE 4192545 T DE4192545 T DE 4192545T
Authority
DE
Germany
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.)
Ceased
Application number
DE19914192545
Other languages
German (de)
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.)
Filing date
Publication date
Application filed filed Critical
Publication of DE4192545T publication Critical patent/DE4192545T/de
Ceased legal-status Critical Current

Links

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
DE19914192545 1990-10-10 1991-08-19 Ceased DE4192545T (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59506290A 1990-10-10 1990-10-10

Publications (1)

Publication Number Publication Date
DE4192545T true DE4192545T (zh) 1992-10-08

Family

ID=24381563

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19914192545 Ceased DE4192545T (zh) 1990-10-10 1991-08-19

Country Status (8)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356658A (en) * 1981-02-11 1982-11-02 Goldfarb Adolph E Multiple and varied motion stage apparatus for doll figure
US4356657A (en) * 1981-02-11 1982-11-02 Adolph E. Goldfarb Toy car wash apparatus and method
US4591805A (en) * 1984-05-30 1986-05-27 General Electric Company Adaptive bandwidth amplifier
DE3737581A1 (de) * 1987-11-05 1989-05-18 Grundig Emv Einrichtung zum automatischen anlegen der abgleichspannungen an die abstimmbaren schaltungselemente des zf-verstaerkers eines fernsehempfaengers

Family Cites Families (11)

* 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
CA1190289A (en) * 1981-04-28 1985-07-09 Nippon Hoso Kyokai Fm signal demodulation system
WO1983000973A1 (fr) * 1981-08-31 1983-03-17 Ohta, Tomozo Systeme demodulateur fm de sensibilite elevee
MX151560A (es) * 1981-08-31 1984-12-13 Oki Electric Ind Co Ltd Mejoras a sistema de demodulacion de alta sensibilidad para senales de f.m. de television
IT1212744B (it) * 1983-05-19 1989-11-30 Sogs Ates Componenti Elettroni Circuito per l'attenuazione dei disturbi in un radioricevitore mediante l'impiego di un filtro passa-basso a banda passante regolabile.
US4839542A (en) * 1984-08-21 1989-06-13 General Datacomm Industries, Inc. Active transconductance filter device
JPH02186723A (ja) * 1988-08-25 1990-07-23 Nec Corp 受信機
US5051628A (en) * 1990-01-02 1991-09-24 Motorola, Inc. Integrated filter circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4356658A (en) * 1981-02-11 1982-11-02 Goldfarb Adolph E Multiple and varied motion stage apparatus for doll figure
US4356657A (en) * 1981-02-11 1982-11-02 Adolph E. Goldfarb Toy car wash apparatus and method
US4591805A (en) * 1984-05-30 1986-05-27 General Electric Company Adaptive bandwidth amplifier
DE3737581A1 (de) * 1987-11-05 1989-05-18 Grundig Emv Einrichtung zum automatischen anlegen der abgleichspannungen an die abstimmbaren schaltungselemente des zf-verstaerkers eines fernsehempfaengers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SCHAUMANN u.a.: Modern Active Filter Design, IEEE Press, 1981, S. 293-300 *

Also Published As

Publication number Publication date
AR246644A1 (es) 1994-08-31
MX9101511A (es) 1992-06-05
BR9106178A (pt) 1993-03-16
GB9503349D0 (en) 1995-04-12
GB2284718A (en) 1995-06-14
GB2255461B (en) 1995-06-14
WO1992007422A1 (en) 1992-04-30
GB2255461A (en) 1992-11-04
GB9212049D0 (en) 1992-08-12
CA2069639A1 (en) 1992-04-11
JPH05503409A (ja) 1993-06-03

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8125 Change of the main classification

Ipc: H04Q 7/32

8131 Rejection