DK545688A - Frekvens differens detektor (fdd) og en baereboelgemoduleret modtager indeholdende en saadan fdd - Google Patents

Frekvens differens detektor (fdd) og en baereboelgemoduleret modtager indeholdende en saadan fdd

Info

Publication number
DK545688A
DK545688A DK545688A DK545688A DK545688A DK 545688 A DK545688 A DK 545688A DK 545688 A DK545688 A DK 545688A DK 545688 A DK545688 A DK 545688A DK 545688 A DK545688 A DK 545688A
Authority
DK
Denmark
Prior art keywords
fdd
residential
frequency difference
difference detector
receiver containing
Prior art date
Application number
DK545688A
Other languages
Danish (da)
English (en)
Other versions
DK545688D0 (da
Inventor
Kah-Seng Chung
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of DK545688D0 publication Critical patent/DK545688D0/da
Publication of DK545688A publication Critical patent/DK545688A/da

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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • 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
    • H03D3/008—Compensating DC offsets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
    • H03D2200/0001—Circuit elements of demodulators
    • H03D2200/0025—Gain control circuits
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
DK545688A 1987-10-05 1988-09-30 Frekvens differens detektor (fdd) og en baereboelgemoduleret modtager indeholdende en saadan fdd DK545688A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8723312A GB2210742A (en) 1987-10-05 1987-10-05 Frequency difference detector (fdd) and a carrier modulated receiver including such a fdd

Publications (2)

Publication Number Publication Date
DK545688D0 DK545688D0 (da) 1988-09-30
DK545688A true DK545688A (da) 1989-04-06

Family

ID=10624792

Family Applications (1)

Application Number Title Priority Date Filing Date
DK545688A DK545688A (da) 1987-10-05 1988-09-30 Frekvens differens detektor (fdd) og en baereboelgemoduleret modtager indeholdende en saadan fdd

Country Status (8)

Country Link
US (1) US5014352A (fr)
EP (1) EP0313126A1 (fr)
JP (1) JPH01135223A (fr)
KR (1) KR890007512A (fr)
CA (1) CA1299250C (fr)
DK (1) DK545688A (fr)
FI (1) FI87960C (fr)
GB (1) GB2210742A (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69420727T2 (de) * 1993-06-04 2000-01-05 Rca Thomson Licensing Corp., Princeton Tuner mit direktumsetzung
US5701591A (en) * 1995-04-07 1997-12-23 Telecommunications Equipment Corporation Multi-function interactive communications system with circularly/elliptically polarized signal transmission and reception
CN1066870C (zh) * 1995-05-10 2001-06-06 罗克马诺尔研究有限公司 直接变频接收机
EP0772289A1 (fr) * 1995-10-31 1997-05-07 Philips Composants Et Semiconducteurs Dispositif, de type boucle à verrouillage de phase, pour la démodulation d'un signal modulé en fréquence
DE19605704A1 (de) * 1996-02-16 1997-08-21 Bosch Gmbh Robert Frequenzfehlerdetektor
US6018553A (en) * 1996-09-18 2000-01-25 Wireless Access Multi-level mixer architecture for direct conversion of FSK signals
US6020765A (en) * 1997-05-30 2000-02-01 Sun Microsystems, Inc. Frequency difference detector for use with an NRZ signal
US6233435B1 (en) 1997-10-14 2001-05-15 Telecommunications Equipment Corporation Multi-function interactive communications system with circularly/elliptically polarized signal transmission and reception
US6144845A (en) * 1997-12-31 2000-11-07 Motorola, Inc. Method and circuit for image rejection
US6385442B1 (en) * 1998-03-04 2002-05-07 Symbol Technologies, Inc. Multiphase receiver and oscillator
DE19930229C1 (de) * 1999-06-30 2001-07-05 Infineon Technologies Ag Quadricorrelator für einen Demodulator für frequenzmodulierte Signale
US6847255B2 (en) * 2001-06-01 2005-01-25 Broadband Innovations, Inc. Zero IF complex quadrature frequency discriminator and FM demodulator
US6979400B2 (en) 2003-07-10 2005-12-27 Zodiac Pool Care, Inc. Automatic swimming pool cleaners with shaped floats and water-temperature or -pressure indicators and water-circulation systems incorporating such indicators
US7397300B2 (en) * 2003-09-09 2008-07-08 Analog Devices, Inc. FSK demodulator system and method
US8369820B2 (en) * 2007-09-05 2013-02-05 General Instrument Corporation Frequency multiplier device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160815A (en) * 1962-09-14 1964-12-08 Collins Radio Co Coherent frequency difference detector having direct-current output independent of modulation
HU175236B (hu) * 1977-01-10 1980-06-28 Hiradastech Ipari Kutato Sposob i ustrojstvo dlja prijoma i generacii chastotno-modulirovannykh signalov
US4200871A (en) * 1977-06-29 1980-04-29 Sperry Corporation Acquisition system for continuous-wave frequency modulation object detector
US4677690A (en) * 1982-01-25 1987-06-30 International Telephone And Telegraph Corporation Baseband demodulator for FM and/or AM signals
US4620160A (en) * 1984-12-17 1986-10-28 Fairchild Weston Systems, Inc. Digital demodulator for continuously phase or frequency modulated signals
DE3517485A1 (de) * 1985-05-15 1986-11-20 Blaupunkt-Werke Gmbh, 3200 Hildesheim Demodulator fuer frequenzmodulierte signale in digitaler form
GB2175473A (en) * 1985-05-17 1986-11-26 Philips Electronic Associated D.c. block capacitor circuit
GB2193405A (en) * 1986-08-01 1988-02-03 Philips Electronic Associated Demodulating an angle-modulated signal
US4736390A (en) * 1986-10-15 1988-04-05 Itt Avionics, A Division Of Itt Corporation Zero IF radio receiver apparatus

Also Published As

Publication number Publication date
FI884508A0 (fi) 1988-09-30
FI87960C (fi) 1993-03-10
FI884508A7 (fi) 1989-04-06
FI87960B (fi) 1992-11-30
JPH01135223A (ja) 1989-05-26
EP0313126A1 (fr) 1989-04-26
GB8723312D0 (en) 1987-11-11
CA1299250C (fr) 1992-04-21
US5014352A (en) 1991-05-07
DK545688D0 (da) 1988-09-30
GB2210742A (en) 1989-06-14
KR890007512A (ko) 1989-06-20

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment