ES8402479A1 - Un demodulador de banda base para senales de fm. - Google Patents
Un demodulador de banda base para senales de fm.Info
- Publication number
- ES8402479A1 ES8402479A1 ES519253A ES519253A ES8402479A1 ES 8402479 A1 ES8402479 A1 ES 8402479A1 ES 519253 A ES519253 A ES 519253A ES 519253 A ES519253 A ES 519253A ES 8402479 A1 ES8402479 A1 ES 8402479A1
- Authority
- ES
- Spain
- Prior art keywords
- signals
- mixers
- signal
- output
- frequency
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
-
- 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
- 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
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Television Receiver Circuits (AREA)
Abstract
DEMODULADOR DE BANDA BASE PARA SEÑALES DE FM. CONSTA DE UNA ANTENA (10) ACOPLADA A LA ENTRADA DE UN AMPLIFICADOR DE GANANCIA VARIABLE (11), LA SALIDA DE (11) SE CONECTA A LA ENTRADA DE UN MEZCLADOR (12) Y OTRO MEZCLADOR (13), ESTOS RECIBEN ADEMAS UNA ENTRADA DE UN OSCILADOR LOCAL (44). A LA SALIDA DE (12) Y (13) SE ACOPLA UN FILTRO PASO BAJO (14) Y (15) RESPECTIVAMENTE. LA SALIDA DE (14) Y (15) SE ACOPLA A LA ENTRADA DEL AMPLIFICADOR (16) Y (17) RESPECTIVAMENTE. LA SALIDA DE (16) Y (17) SE ACOPLA AL MEZCLADOR (18) Y (19) RESPECTIVAMENTE. LA OTRA ENTRADA DE (18) SE DERIVA DE LA SALIDA DEL FILTRO PASO BAJO (20) Y LA DEL (19) DEL FILTRO (21). LA ENTRADA DE (20) Y (21) ESA ACOPLADA A LA SALIDA DEL MEZCLADOR (22) Y (23) RESPECTIVAMENTE. LOS MEZCLADORES (22) Y (12) RECIBEN COS W0T. LAS OTRAS ENTRADAS DE (22) Y (23) SE DERIVAN DE UN OSCILADOR CONTROLADO A TENSION (24) CUYA ENTRADA (25) RECIBE UNA TENSION DE CONTROL DC DERIVADA DEL OSCILADOR LOCAL (14). EL AMPLIFICADOR OPERACIONAL (30) TIENE ACOPLADO ENTRE TERMINAL DE SALIDA Y TERMINAL DE INVERSOR UN CONDENSADOR (31), Y ACOPLADO EN AC EL TERMINAL DE SALIDA A TRAVES DEL CONDENSADOR (32). LA SALIDA DE (30) SE ACOPLA A TRAVES DE UN CUADRIPOLO DE ESTABILIZACION (SN) (33).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/342,442 US4476585A (en) | 1982-01-25 | 1982-01-25 | Baseband demodulator for FM signals |
Publications (2)
Publication Number | Publication Date |
---|---|
ES519253A0 ES519253A0 (es) | 1984-02-01 |
ES8402479A1 true ES8402479A1 (es) | 1984-02-01 |
Family
ID=23341848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES519253A Expired ES8402479A1 (es) | 1982-01-25 | 1983-01-25 | Un demodulador de banda base para senales de fm. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4476585A (es) |
EP (1) | EP0084876A3 (es) |
AU (1) | AU555938B2 (es) |
CA (1) | CA1199377A (es) |
ES (1) | ES8402479A1 (es) |
NZ (1) | NZ202844A (es) |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4599743A (en) * | 1982-01-25 | 1986-07-08 | Itt Corporation | Baseband demodulator for FM and/or AM signals |
US4677690A (en) * | 1982-01-25 | 1987-06-30 | International Telephone And Telegraph Corporation | Baseband demodulator for FM and/or AM signals |
JPH063947B2 (ja) * | 1983-03-16 | 1994-01-12 | 日本電気株式会社 | 自動利得制御回路 |
US4577157A (en) * | 1983-12-12 | 1986-03-18 | International Telephone And Telegraph Corporation | Zero IF receiver AM/FM/PM demodulator using sampling techniques |
US4651107A (en) * | 1984-01-11 | 1987-03-17 | Nec Corporation | Demodulator for digital FM signals |
GB2168864A (en) * | 1984-12-19 | 1986-06-25 | Philips Electronic Associated | Radio receiver/transmitter filters |
DE3516492A1 (de) * | 1985-05-08 | 1986-11-13 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Funkempfaenger |
GB8521061D0 (en) * | 1985-08-22 | 1985-09-25 | Plessey Co Plc | Fm demodulators |
NL8502967A (nl) * | 1985-09-19 | 1987-04-16 | Philips Nv | Hoekdemodulator. |
US4811425A (en) * | 1987-01-09 | 1989-03-07 | Itt Avionics, A Division Of Itt Corporation | Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers |
EP0305603B1 (en) * | 1987-09-03 | 1993-03-10 | Koninklijke Philips Electronics N.V. | Gain and phase correction in a dual branch receiver |
DE3815055A1 (de) * | 1988-05-04 | 1989-11-16 | Standard Elektrik Lorenz Ag | Quadratur-empfaenger |
US4944025A (en) * | 1988-08-09 | 1990-07-24 | At&E Corporation | Direct conversion FM receiver with offset |
US4980687A (en) * | 1988-10-13 | 1990-12-25 | Systron Donner | Digital demodulator |
US5140703A (en) * | 1988-10-14 | 1992-08-18 | Payne Christopher P | Modulation distortion analyzer |
US4910467A (en) * | 1988-11-02 | 1990-03-20 | Motorola, Inc. | Method and apparatus for decoding a quadrature modulated signal |
US5233634A (en) * | 1989-10-18 | 1993-08-03 | Nokia Mobile Phones Ltd. | Automatic gain control circuit in a radio telephone receiver |
US5040240A (en) * | 1989-11-30 | 1991-08-13 | Magnavox Government And Industrial Electronics Company | Receiver architecture for use with a global positioning system |
US5263194A (en) * | 1990-03-07 | 1993-11-16 | Seiko Corp. | Zero if radio receiver for intermittent operation |
GB9017418D0 (en) * | 1990-08-08 | 1990-09-19 | Gen Electric Co Plc | Half frequency mixer |
US5187809A (en) * | 1990-08-24 | 1993-02-16 | Motorola, Inc. | Dual mode automatic gain control |
US5222253A (en) * | 1990-08-29 | 1993-06-22 | Motorola, Inc. | Transient suppression circuit for a time domain duplex transceiver |
US5241702A (en) * | 1990-09-06 | 1993-08-31 | Telefonaktiebolaget L M Ericsson | D.c. offset compensation in a radio receiver |
US5613233A (en) * | 1994-09-30 | 1997-03-18 | Rockwell International Corp. | Apparatus with distortion cancelling feedback signal |
US6633550B1 (en) | 1997-02-20 | 2003-10-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Radio transceiver on a chip |
US6356736B2 (en) | 1997-02-28 | 2002-03-12 | Maxim Integrated Products, Inc. | Direct-conversion tuner integrated circuit for direct broadcast satellite television |
US6031878A (en) * | 1997-02-28 | 2000-02-29 | Maxim Integrated Products, Inc. | Direct-conversion tuner integrated circuit for direct broadcast satellite television |
US6608869B1 (en) * | 1999-05-26 | 2003-08-19 | Samsung Electronics Co., Ltd. | Dual-carrier heterodyne for separating orthogonal components of complex amplitude-modulation signals |
CA2281236C (en) | 1999-09-01 | 2010-02-09 | Tajinder Manku | Direct conversion rf schemes using a virtually generated local oscillator |
US6714776B1 (en) * | 1999-09-28 | 2004-03-30 | Microtune (Texas), L.P. | System and method for an image rejecting single conversion tuner with phase error correction |
US7095801B1 (en) * | 2001-03-30 | 2006-08-22 | Skyworks Solutions, Inc. | Phase adjustable polyphase filters |
KR20060056095A (ko) * | 2004-11-19 | 2006-05-24 | 지씨티 세미컨덕터 인코포레이티드 | 집적화된 무선 수신 장치 및 그 방법 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1530602A (en) * | 1975-10-14 | 1978-11-01 | Standard Telephones Cables Ltd | Demodulator for fm signals |
HU175236B (hu) * | 1977-01-10 | 1980-06-28 | Hiradastech Ipari Kutato | Sposob i ustrojstvo dlja prijoma i generacii chastotno-modulirovannykh signalov |
US4348641A (en) * | 1980-01-08 | 1982-09-07 | E-Systems, Inc. | Digital baseband carrier recovery circuit |
-
1982
- 1982-01-25 US US06/342,442 patent/US4476585A/en not_active Expired - Lifetime
- 1982-12-15 AU AU91544/82A patent/AU555938B2/en not_active Ceased
- 1982-12-17 NZ NZ202844A patent/NZ202844A/en unknown
-
1983
- 1983-01-22 EP EP83100559A patent/EP0084876A3/de not_active Withdrawn
- 1983-01-24 CA CA000420077A patent/CA1199377A/en not_active Expired
- 1983-01-25 ES ES519253A patent/ES8402479A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0084876A3 (de) | 1985-10-23 |
AU9154482A (en) | 1983-08-04 |
NZ202844A (en) | 1985-12-13 |
EP0084876A2 (de) | 1983-08-03 |
US4476585A (en) | 1984-10-09 |
ES519253A0 (es) | 1984-02-01 |
CA1199377A (en) | 1986-01-14 |
AU555938B2 (en) | 1986-10-16 |
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