AR246644A1 - Active filter circuit - Google Patents
Active filter circuitInfo
- Publication number
- AR246644A1 AR246644A1 AR32063991A AR32063991A AR246644A1 AR 246644 A1 AR246644 A1 AR 246644A1 AR 32063991 A AR32063991 A AR 32063991A AR 32063991 A AR32063991 A AR 32063991A AR 246644 A1 AR246644 A1 AR 246644A1
- Authority
- AR
- Argentina
- Prior art keywords
- signal
- filter
- circuit
- receive
- coupled
- Prior art date
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmitters (AREA)
- Networks Using Active Elements (AREA)
- Mobile Radio Communication Systems (AREA)
- Noise Elimination (AREA)
Abstract
UN RADIO RECEPTOR OPERADO PARA RECIBIR UNA SENAL DE RADIO FRECUENCIA,QUE COMPRENDE: UN CIRCUITO DE ENTRADA ACOPLADO A LA ENTRADA PARA RECIBIR LA SENAL DE RADIO FRECUENCIA Y GENERAR UNA SENAL DE SALIDA; UN PRIMER FILTRO ACOPLADO A EL CIRCUITO DE ENTRADA PARA RECIBIR LA SENAL DE SALIDA ALLI, EL PRIMER FILTRO TIENE UN CIRCUITO DE TRANSCONDUCTANCIA ACOPLADO A UNA ENTRADA DE CONTROL DE SENAL, DEPENDIENDO LOS VALORES DEL COMPONENTE DEL CIRCUITO DE TRANSCONDUCTANCIA DEL VALOR DE LA SENAL DE CONTROL Y EL PRIMER FILTRO INCLUYE CAPACITORES, EL CIRCUITO DE TRANSCONDUCTANCIA Y LOS CAPACITORES FORMAN UN FILTRO DE POLOS MULTIPLES, LA BANDA DE PASO DEL PRIMER FILTRO SELECCIONADO POR LOS VALORES DE LOS ELEMENTOS DE TRANSCONDUCTANCIA SON ESTABLECIDOS POR LA SENAL DE CONTROL APLICADA A LA ENTRADA DE CONTROL DE SENAL; Y UN DEMODULADOR ACOPLADO A LA SALIDA DEL PRIMER FILTRO PARA RECIBIR LA SENAL DE SALIDA FILTRADA, Y PARA DEMODULAR LA SENAL FILTRADA PARA PRODUCIR LA SENAL PROCESADA.A RADIO RECEIVER OPERATED TO RECEIVE A RADIO FREQUENCY SIGNAL, INCLUDING: AN ENTRY CIRCUIT COUPLED TO THE ENTRY TO RECEIVE THE RADIO FREQUENCY SIGNAL AND GENERATE AN EXIT SIGNAL; A FIRST FILTER COUPLED TO THE INPUT CIRCUIT TO RECEIVE THE OUTPUT SIGNAL THERE, THE FIRST FILTER HAS A TRANSCONDUCTANCE CIRCUIT COUPLED TO A SIGNAL CONTROL INPUT, DEPENDING ON THE VALUES OF THE COMPONENT OF THE TRANSCONDUCT CIRCUIT COMPONENT OF THE SIGNAL OF THE TRANSCONDUCT CIRCUIT. AND THE FIRST FILTER INCLUDES CAPACITORS, THE TRANSCONDUCTANCE CIRCUIT AND THE CAPACITORS FORM A MULTIPLE POLE FILTER, THE PASS BAND OF THE FIRST FILTER SELECTED BY THE VALUES OF THE TRANSCONDUCTANCE ELEMENTS ARE CONTROLLED BY THE SIGNAL AT THE CONTROL SIGNAL OF SENAL; AND A DEMODULATOR COUPLED AT THE OUTPUT OF THE FIRST FILTER TO RECEIVE THE FILTERED OUTPUT SIGNAL, AND TO DEMODULATE THE FILTERED SIGNAL TO PRODUCE THE PROCESSED SIGNAL.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US59506290A | 1990-10-10 | 1990-10-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AR246644A1 true AR246644A1 (en) | 1994-08-31 |
Family
ID=24381563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AR32063991A AR246644A1 (en) | 1990-10-10 | 1991-09-11 | 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 (2)
| 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 |
Family Cites Families (15)
| 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 |
| 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 |
| CA1190289A (en) * | 1981-04-28 | 1985-07-09 | Nippon Hoso Kyokai | Fm signal demodulation system |
| EP0086838B1 (en) * | 1981-08-31 | 1986-11-20 | Oki Electric Industry Company, Limited | High-sensitivity fm signal demodulation system |
| US4527187A (en) * | 1981-08-31 | 1985-07-02 | Oki Electric Industry Co., Ltd. | High sensitivity FM signal demodulation 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 CA CA 2069639 patent/CA2069639A1/en not_active Abandoned
- 1991-08-19 WO PCT/US1991/005876 patent/WO1992007422A1/en active Application Filing
- 1991-08-19 GB GB9212049A patent/GB2255461B/en not_active Expired - Fee Related
- 1991-08-19 JP JP51833291A patent/JPH05503409A/en active Pending
- 1991-08-19 BR BR919106178A patent/BR9106178A/en unknown
- 1991-08-19 DE DE19914192545 patent/DE4192545T/de not_active Ceased
- 1991-08-19 GB GB9503349A patent/GB2284718A/en not_active Withdrawn
- 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 |
|---|---|
| MX9101511A (en) | 1992-06-05 |
| GB2255461B (en) | 1995-06-14 |
| JPH05503409A (en) | 1993-06-03 |
| CA2069639A1 (en) | 1992-04-11 |
| BR9106178A (en) | 1993-03-16 |
| GB9503349D0 (en) | 1995-04-12 |
| DE4192545T (en) | 1992-10-08 |
| GB2284718A (en) | 1995-06-14 |
| GB2255461A (en) | 1992-11-04 |
| WO1992007422A1 (en) | 1992-04-30 |
| GB9212049D0 (en) | 1992-08-12 |
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