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
Application number
ES519253A
Other languages
English (en)
Other versions
ES519253A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 by Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES519253A0 publication Critical patent/ES519253A0/es
Publication of ES8402479A1 publication Critical patent/ES8402479A1/es
Expired legal-status Critical Current

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).
ES519253A 1982-01-25 1983-01-25 Un demodulador de banda base para senales de fm. Expired ES8402479A1 (es)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677690A (en) * 1982-01-25 1987-06-30 International Telephone And Telegraph Corporation Baseband demodulator for FM and/or AM signals
US4599743A (en) * 1982-01-25 1986-07-08 Itt 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
US6031878A (en) * 1997-02-28 2000-02-29 Maxim Integrated Products, Inc. Direct-conversion tuner integrated circuit for direct broadcast satellite television
US6356736B2 (en) 1997-02-28 2002-03-12 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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
EP0084876A3 (de) 1985-10-23
US4476585A (en) 1984-10-09
ES519253A0 (es) 1984-02-01
CA1199377A (en) 1986-01-14
AU555938B2 (en) 1986-10-16
NZ202844A (en) 1985-12-13
AU9154482A (en) 1983-08-04
EP0084876A2 (de) 1983-08-03

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