FR2444376A1 - Montage d'entree de recepteur a rapport signal/bruit ameliore - Google Patents

Montage d'entree de recepteur a rapport signal/bruit ameliore

Info

Publication number
FR2444376A1
FR2444376A1 FR7930776A FR7930776A FR2444376A1 FR 2444376 A1 FR2444376 A1 FR 2444376A1 FR 7930776 A FR7930776 A FR 7930776A FR 7930776 A FR7930776 A FR 7930776A FR 2444376 A1 FR2444376 A1 FR 2444376A1
Authority
FR
France
Prior art keywords
frequency
noise ratio
improved signal
receiver input
mixer
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.)
Granted
Application number
FR7930776A
Other languages
English (en)
Other versions
FR2444376B1 (fr
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2444376A1 publication Critical patent/FR2444376A1/fr
Application granted granted Critical
Publication of FR2444376B1 publication Critical patent/FR2444376B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
    • H03D3/004—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling an oscillator, e.g. the local oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F7/00—Parametric amplifiers
    • H03F7/04—Parametric amplifiers using variable-capacitance element; using variable-permittivity element
    • 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
    • H03G3/3094—Automatic control in amplifiers having semiconductor devices in parametric amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)

Abstract

Montage d'entrée de récepteur à rapport signal/bruit amélioré F < 1 en amont du démodulateur et comportant un mélangeur-diviseur paramétrique à fréquences directes avec un démodulateur en aval. Le mélangeur est alimenté par un oscillateur de pompage, dont la fréquence et la phase sont asservies par une boucle de régulation de façon que p = 2z et p + z = 3z, p étant la fréquence de l'oscillateur de pompage et z la fréquence intermédiaire. Le mélangeur est bouclé à la fréquence-image par une résistance réelle et permet une amplification de puissance.
FR7930776A 1978-12-15 1979-12-14 Montage d'entree de recepteur a rapport signal/bruit ameliore Expired FR2444376B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2854128A DE2854128C3 (de) 1978-12-15 1978-12-15 Empfängerschaltung mit Verbesserung des Signal-Rauschabstandes

Publications (2)

Publication Number Publication Date
FR2444376A1 true FR2444376A1 (fr) 1980-07-11
FR2444376B1 FR2444376B1 (fr) 1985-06-07

Family

ID=6057244

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7930776A Expired FR2444376B1 (fr) 1978-12-15 1979-12-14 Montage d'entree de recepteur a rapport signal/bruit ameliore

Country Status (7)

Country Link
US (1) US4387470A (fr)
JP (1) JPS5583348A (fr)
CA (1) CA1139846A (fr)
DE (1) DE2854128C3 (fr)
FR (1) FR2444376B1 (fr)
GB (1) GB2039430B (fr)
IT (1) IT1127681B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549313A1 (fr) * 1983-06-23 1985-01-18 Clarion Co Ltd Recepteur comprenant un amplificateur d'onde acoustique de surface

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3335024A1 (de) * 1983-09-28 1985-04-11 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung fuer einen empfaenger mit zwei phasenregelkreisen
GB8501035D0 (en) * 1985-01-16 1985-02-20 Senior J Prostaglandins
US5983077A (en) * 1997-07-31 1999-11-09 Ericsson Inc. Systems and methods for automatic deviation setting and control in radio transmitters
GB2469159B (en) 2009-04-03 2011-12-21 Siemens Ag Upconverter
GB0905752D0 (en) * 2009-04-03 2009-05-20 Siemens Ag Hybrid amplifier
GB0905770D0 (en) 2009-04-03 2009-05-20 Siemens Ag Bias control
GB0905768D0 (en) * 2009-04-03 2009-05-20 Siemens Ag Antenna feed
GB0905755D0 (en) * 2009-04-03 2009-05-20 Siemens Ag Directional coupler
GB0915657D0 (en) * 2009-09-08 2009-10-07 Siemens Ag Amplifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428900A (en) * 1965-11-26 1969-02-18 Rca Corp Distributed feedback frequency compression in frequency modulation reception
US3544899A (en) * 1966-02-17 1970-12-01 Igor Alexandrovich Gusyatinsky Frequency-modulated receiver with decreased threshold level
FR2157933A1 (fr) * 1971-10-26 1973-06-08 Licentia Gmbh
FR2189934A1 (fr) * 1972-06-22 1974-01-25 Licentia Gmbh

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL277424A (fr) * 1961-04-25
US3231822A (en) * 1961-12-22 1966-01-25 Bell Telephone Labor Inc Frequency modulation feedback receiver
US4042884A (en) * 1975-02-20 1977-08-16 Rixon, Inc. Phase demodulator with offset frequency reference oscillator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428900A (en) * 1965-11-26 1969-02-18 Rca Corp Distributed feedback frequency compression in frequency modulation reception
US3544899A (en) * 1966-02-17 1970-12-01 Igor Alexandrovich Gusyatinsky Frequency-modulated receiver with decreased threshold level
FR2157933A1 (fr) * 1971-10-26 1973-06-08 Licentia Gmbh
FR2189934A1 (fr) * 1972-06-22 1974-01-25 Licentia Gmbh

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ARCHIV DER ELEKTRISCHEN ]BERTRAGUNG, vol. 24, no. 9, 1970, pages 419-424, Stuttgart (DE); *
ARCHIV F]R ELEKTRONIK UND ]BERTRAGUNGSTECHNIK, vol. 31, no. 3, 1977, pages 98-100, Stuttgart (DE); *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549313A1 (fr) * 1983-06-23 1985-01-18 Clarion Co Ltd Recepteur comprenant un amplificateur d'onde acoustique de surface

Also Published As

Publication number Publication date
IT1127681B (it) 1986-05-21
JPS648934B2 (fr) 1989-02-15
CA1139846A (fr) 1983-01-18
GB2039430B (en) 1983-04-13
JPS5583348A (en) 1980-06-23
DE2854128B2 (de) 1981-06-19
GB2039430A (en) 1980-08-06
DE2854128A1 (de) 1980-06-19
US4387470A (en) 1983-06-07
DE2854128C3 (de) 1982-02-18
IT7928004A0 (it) 1979-12-07
FR2444376B1 (fr) 1985-06-07

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Legal Events

Date Code Title Description
TP Transmission of property
CD Change of name or company name
ST Notification of lapse