GB9517255D0 - Direct broadcasting satellite tuner with negative feedback circuit for tracking if image signal - Google Patents

Direct broadcasting satellite tuner with negative feedback circuit for tracking if image signal

Info

Publication number
GB9517255D0
GB9517255D0 GBGB9517255.7A GB9517255A GB9517255D0 GB 9517255 D0 GB9517255 D0 GB 9517255D0 GB 9517255 A GB9517255 A GB 9517255A GB 9517255 D0 GB9517255 D0 GB 9517255D0
Authority
GB
United Kingdom
Prior art keywords
tracking
image signal
feedback circuit
negative feedback
direct broadcasting
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.)
Withdrawn
Application number
GBGB9517255.7A
Other versions
GB2304478A (en
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.)
Hwa Lin Electronic Co Ltd
Original Assignee
Hwa Lin Electronic Co Ltd
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 Hwa Lin Electronic Co Ltd filed Critical Hwa Lin Electronic Co Ltd
Priority to DE19531032A priority Critical patent/DE19531032A1/en
Priority to GB9517255A priority patent/GB2304478A/en
Publication of GB9517255D0 publication Critical patent/GB9517255D0/en
Publication of GB2304478A publication Critical patent/GB2304478A/en
Withdrawn legal-status Critical Current

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
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • 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
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/08—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using varactors, i.e. voltage variable reactive diodes
GB9517255A 1995-08-23 1995-08-23 Direct broadcasting satellite tuner with negative feedback circuit to filter for tracking if image signal Withdrawn GB2304478A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19531032A DE19531032A1 (en) 1995-08-23 1995-08-23 Tuner for direct reception of satellite transmission
GB9517255A GB2304478A (en) 1995-08-23 1995-08-23 Direct broadcasting satellite tuner with negative feedback circuit to filter for tracking if image signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19531032A DE19531032A1 (en) 1995-08-23 1995-08-23 Tuner for direct reception of satellite transmission
GB9517255A GB2304478A (en) 1995-08-23 1995-08-23 Direct broadcasting satellite tuner with negative feedback circuit to filter for tracking if image signal

Publications (2)

Publication Number Publication Date
GB9517255D0 true GB9517255D0 (en) 1995-10-25
GB2304478A GB2304478A (en) 1997-03-19

Family

ID=26017932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9517255A Withdrawn GB2304478A (en) 1995-08-23 1995-08-23 Direct broadcasting satellite tuner with negative feedback circuit to filter for tracking if image signal

Country Status (2)

Country Link
DE (1) DE19531032A1 (en)
GB (1) GB2304478A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20062294A1 (en) * 2006-11-29 2008-05-30 St Microelectronics Srl CIRCUIT FOR THE GENERATION OF SIGNALS WITH PULSE WIDTH MODULATION PARTICULARLY FOR A SATELLITE RECEPTION SYSTEM

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1190289A (en) * 1981-04-28 1985-07-09 Nippon Hoso Kyokai Fm signal demodulation system
US4792993A (en) * 1985-10-30 1988-12-20 Capetronic (Bsr) Ltd. TVRD receiver system with automatic bandwidth adjustment
JPH02186723A (en) * 1988-08-25 1990-07-23 Nec Corp Receiver
GB2270223B (en) * 1992-08-29 1996-06-19 Motorola Israel Ltd A communications system

Also Published As

Publication number Publication date
GB2304478A (en) 1997-03-19
DE19531032A1 (en) 1997-02-27

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)