IT1131352B - DEMODULATOR - Google Patents

DEMODULATOR

Info

Publication number
IT1131352B
IT1131352B IT22867/80A IT2286780A IT1131352B IT 1131352 B IT1131352 B IT 1131352B IT 22867/80 A IT22867/80 A IT 22867/80A IT 2286780 A IT2286780 A IT 2286780A IT 1131352 B IT1131352 B IT 1131352B
Authority
IT
Italy
Prior art keywords
demodulator
Prior art date
Application number
IT22867/80A
Other languages
Italian (it)
Other versions
IT8022867A0 (en
Inventor
Christopher Keith Richardson
Original Assignee
Plessey Handel Investment Ag
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 Plessey Handel Investment Ag filed Critical Plessey Handel Investment Ag
Publication of IT8022867A0 publication Critical patent/IT8022867A0/en
Application granted granted Critical
Publication of IT1131352B publication Critical patent/IT1131352B/en

Links

Classifications

    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions
    • 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
    • H03D7/166—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature using two or more quadrature frequency translation stages
    • 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
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/408—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency the transmitter oscillator frequency being identical to the receiver local oscillator frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Transceivers (AREA)
IT22867/80A 1979-06-27 1980-06-18 DEMODULATOR IT1131352B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7922417A GB2052196A (en) 1979-06-27 1979-06-27 Demodulators

Publications (2)

Publication Number Publication Date
IT8022867A0 IT8022867A0 (en) 1980-06-18
IT1131352B true IT1131352B (en) 1986-06-18

Family

ID=10506144

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22867/80A IT1131352B (en) 1979-06-27 1980-06-18 DEMODULATOR

Country Status (9)

Country Link
JP (1) JPS568944A (en)
BR (1) BR8003834A (en)
DE (1) DE3023773A1 (en)
DK (1) DK275980A (en)
FR (1) FR2460069A1 (en)
GB (1) GB2052196A (en)
IL (1) IL60172A0 (en)
IT (1) IT1131352B (en)
NL (1) NL8003663A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499426A (en) * 1980-07-02 1985-02-12 Motorola, Inc. Baseband discriminator for frequency or transform modulation
GB2300318B (en) * 1981-02-10 1997-03-19 Plessey Co Ltd Improvements in or relating to transceivers
NL8301179A (en) * 1983-04-01 1984-11-01 Philips Nv HF SIGNAL RECEIVER FITTED WITH A PAIR OF PARALLEL SIGNAL ROADS.
NL8301651A (en) * 1983-05-10 1984-12-03 Philips Nv MIXING DEVICE EQUIPPED WITH FIRST AND SECOND SQUARE STAGES.
JPS60224337A (en) * 1984-04-23 1985-11-08 Nec Corp Receiving circuit
AT394918B (en) * 1990-04-05 1992-07-27 Klaus Dipl Ing Dr Kerschbaumer METHOD FOR DIRECTLY DEMODULATING AN RF SIGNAL
JP2800858B2 (en) * 1991-09-18 1998-09-21 日本電気株式会社 Wireless telephone equipment
US5389964A (en) * 1992-12-30 1995-02-14 Information Resources, Inc. Broadcast channel substitution method and apparatus
US5404161A (en) * 1993-07-27 1995-04-04 Information Resources, Inc. Tuned signal detector for use with a radio frequency receiver
US6941573B1 (en) 1996-08-07 2005-09-06 Information Resources, Inc. Television distribution system for signal substitution
US6633550B1 (en) 1997-02-20 2003-10-14 Telefonaktiebolaget Lm Ericsson (Publ) Radio transceiver on a chip
FR2794311B1 (en) 1999-05-27 2007-12-14 France Telecom CARRIER FREQUENCY REDUCING PASSET FILTER
GB0122196D0 (en) * 2001-09-14 2001-10-31 Roke Manor Research Improvements to the n-plex transceiver

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1178539A (en) * 1966-12-14 1970-01-21 Plessey Btr Ltd Improvements in Timing Arrangements for Electrical Signalling Systems
US3577088A (en) * 1969-02-03 1971-05-04 Us Air Force Sine-cosine to magnitude-phase angle converter
DE2358288A1 (en) * 1973-11-22 1975-06-05 Standard Elektrik Lorenz Ag RECEIVER FOR FREQUENCY-MODULATED HF SIGNALS
AU513362B2 (en) * 1976-03-16 1980-11-27 Plessey Overseas Ltd. Common channel duplex transmitter Receiver

Also Published As

Publication number Publication date
JPS568944A (en) 1981-01-29
IT8022867A0 (en) 1980-06-18
BR8003834A (en) 1981-01-13
GB2052196A (en) 1981-01-21
DE3023773A1 (en) 1981-01-15
DK275980A (en) 1980-12-28
IL60172A0 (en) 1980-07-31
NL8003663A (en) 1980-12-30
FR2460069A1 (en) 1981-01-16

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