IT1127681B - Circutto di entrata per ricevitori con miglioramento del rapporto segnale-rumore - Google Patents

Circutto di entrata per ricevitori con miglioramento del rapporto segnale-rumore

Info

Publication number
IT1127681B
IT1127681B IT28004/79A IT2800479A IT1127681B IT 1127681 B IT1127681 B IT 1127681B IT 28004/79 A IT28004/79 A IT 28004/79A IT 2800479 A IT2800479 A IT 2800479A IT 1127681 B IT1127681 B IT 1127681B
Authority
IT
Italy
Prior art keywords
receivers
improvement
signal
noise ratio
entry circuit
Prior art date
Application number
IT28004/79A
Other languages
English (en)
Other versions
IT7928004A0 (it
Inventor
Robert Maurer
Hans Peter Petry
Original Assignee
Licentia 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 Gmbh filed Critical Licentia Gmbh
Publication of IT7928004A0 publication Critical patent/IT7928004A0/it
Application granted granted Critical
Publication of IT1127681B publication Critical patent/IT1127681B/it

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)
IT28004/79A 1978-12-15 1979-12-07 Circutto di entrata per ricevitori con miglioramento del rapporto segnale-rumore IT1127681B (it)

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
IT7928004A0 IT7928004A0 (it) 1979-12-07
IT1127681B true IT1127681B (it) 1986-05-21

Family

ID=6057244

Family Applications (1)

Application Number Title Priority Date Filing Date
IT28004/79A IT1127681B (it) 1978-12-15 1979-12-07 Circutto di entrata per ricevitori con miglioramento del rapporto segnale-rumore

Country Status (7)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS604335A (ja) * 1983-06-23 1985-01-10 Clarion Co Ltd 受信機
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
GB0905755D0 (en) * 2009-04-03 2009-05-20 Siemens Ag Directional coupler
GB0905770D0 (en) 2009-04-03 2009-05-20 Siemens Ag Bias control
GB0905768D0 (en) * 2009-04-03 2009-05-20 Siemens Ag Antenna feed
GB0905752D0 (en) * 2009-04-03 2009-05-20 Siemens Ag Hybrid amplifier
GB2469159B (en) 2009-04-03 2011-12-21 Siemens Ag Upconverter
GB0915657D0 (en) * 2009-09-08 2009-10-07 Siemens Ag Amplifier

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL277424A (it) * 1961-04-25
US3231822A (en) * 1961-12-22 1966-01-25 Bell Telephone Labor Inc Frequency modulation feedback receiver
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
FR2157933B1 (it) * 1971-10-26 1980-04-18 Licentia Gmbh
DE2230536C3 (de) * 1972-06-22 1975-07-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellen-Eingangsschaltung mit einem para metrischen Abwärtsmischer
US4042884A (en) * 1975-02-20 1977-08-16 Rixon, Inc. Phase demodulator with offset frequency reference oscillator

Also Published As

Publication number Publication date
FR2444376A1 (fr) 1980-07-11
DE2854128C3 (de) 1982-02-18
IT7928004A0 (it) 1979-12-07
DE2854128A1 (de) 1980-06-19
GB2039430A (en) 1980-08-06
FR2444376B1 (fr) 1985-06-07
DE2854128B2 (de) 1981-06-19
GB2039430B (en) 1983-04-13
JPS5583348A (en) 1980-06-23
US4387470A (en) 1983-06-07
JPS648934B2 (it) 1989-02-15
CA1139846A (en) 1983-01-18

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