HK1006494A1 - Fm-receiver with dynamic intermediate frequency (if) filter tuning - Google Patents

Fm-receiver with dynamic intermediate frequency (if) filter tuning Download PDF

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Publication number
HK1006494A1
HK1006494A1 HK98105223A HK98105223A HK1006494A1 HK 1006494 A1 HK1006494 A1 HK 1006494A1 HK 98105223 A HK98105223 A HK 98105223A HK 98105223 A HK98105223 A HK 98105223A HK 1006494 A1 HK1006494 A1 HK 1006494A1
Authority
HK
Hong Kong
Prior art keywords
signal
tuning control
demodulator
amplifier
filter
Prior art date
Application number
HK98105223A
Other languages
German (de)
English (en)
French (fr)
Chinese (zh)
Other versions
HK1006494B (en
Inventor
Bijker Wolter
Georg Kasperkovitz Wolfdietrich
Clemens De Ruyter Hendricus
Arie Sloof Willem
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of HK1006494A1 publication Critical patent/HK1006494A1/en
Publication of HK1006494B publication Critical patent/HK1006494B/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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • 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
    • H03D3/005—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling a bandpass filter
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)
HK98105223.1A 1992-06-26 1998-06-12 Fm-receiver with dynamic intermediate frequency (if) filter tuning HK1006494B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP92201906 1992-06-26
EP92201906 1992-06-26

Publications (2)

Publication Number Publication Date
HK1006494A1 true HK1006494A1 (en) 1999-02-26
HK1006494B HK1006494B (en) 1999-02-26

Family

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Also Published As

Publication number Publication date
EP0576084B1 (en) 1998-02-18
JP3363949B2 (ja) 2003-01-08
US5404589A (en) 1995-04-04
SG44868A1 (en) 1997-12-19
JPH0677854A (ja) 1994-03-18
KR100291127B1 (ko) 2001-09-17
DE69317016T2 (de) 1998-08-13
TW263640B (OSRAM) 1995-11-21
EP0576084A1 (en) 1993-12-29
DE69317016D1 (de) 1998-03-26

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)