ZW15984A1 - Improvements in or relating to television receivers - Google Patents

Improvements in or relating to television receivers

Info

Publication number
ZW15984A1
ZW15984A1 ZW159/84A ZW15984A ZW15984A1 ZW 15984 A1 ZW15984 A1 ZW 15984A1 ZW 159/84 A ZW159/84 A ZW 159/84A ZW 15984 A ZW15984 A ZW 15984A ZW 15984 A1 ZW15984 A1 ZW 15984A1
Authority
ZW
Zimbabwe
Prior art keywords
relating
television receivers
receivers
television
Prior art date
Application number
ZW159/84A
Other languages
English (en)
Inventor
Harry William Hoodless Adrian
St Valentine Westwood James
William Neale Michael
Original Assignee
Sinclair Res 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 Sinclair Res Ltd filed Critical Sinclair Res Ltd
Publication of ZW15984A1 publication Critical patent/ZW15984A1/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
    • 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
    • H03G3/3052—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
    • H03G3/3063—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 using at least one transistor as controlling device, the transistor being used as a variable impedance device

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Amplifiers (AREA)
  • Picture Signal Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
ZW159/84A 1983-09-15 1984-09-14 Improvements in or relating to television receivers ZW15984A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08324697A GB2148636A (en) 1983-09-15 1983-09-15 Improvements in or relating to television receivers

Publications (1)

Publication Number Publication Date
ZW15984A1 true ZW15984A1 (en) 1985-02-27

Family

ID=10548818

Family Applications (1)

Application Number Title Priority Date Filing Date
ZW159/84A ZW15984A1 (en) 1983-09-15 1984-09-14 Improvements in or relating to television receivers

Country Status (9)

Country Link
EP (1) EP0139470A3 (de)
JP (1) JPS60232707A (de)
KR (1) KR850002724A (de)
AU (1) AU3298284A (de)
BR (1) BR8404620A (de)
ES (1) ES8606766A1 (de)
GB (1) GB2148636A (de)
ZA (1) ZA847216B (de)
ZW (1) ZW15984A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194703B (en) * 1986-06-24 1990-07-11 Cox & Co Closed circuit television system
JPH02190014A (ja) * 1989-01-19 1990-07-26 N S:Kk 低雑音高周波増幅器

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1591506A1 (de) * 1966-06-13
GB1470456A (en) * 1973-06-18 1977-04-14 Sony Corp Automatic gain control circuits
US3970895A (en) * 1974-09-09 1976-07-20 Rca Corporation Circuit for maintaining operating point stability of an amplifier
US4032973A (en) * 1976-05-07 1977-06-28 Gte Laboratories Incorporated Positive feedback high gain agc amplifier
GB1536215A (en) * 1976-07-05 1978-12-20 Decca Ltd Clamping circuits for television signals
US4197557A (en) * 1977-05-05 1980-04-08 Rca Corporation Brightness control circuit employing a closed control loop
DE2811221A1 (de) * 1978-03-15 1979-09-20 Tekade Felten & Guilleaume Verfahren und schaltungsanordnung zur wiedergewinnung der mittleren bildhelligkeit eines videosignals
NL7901722A (nl) * 1979-03-05 1980-09-09 Philips Nv Klemschakeling voor een videosignaal.
US4293822A (en) * 1979-11-09 1981-10-06 General Electric Company Gated AGC amplifier with dc feedback
JPS5675780A (en) * 1979-11-26 1981-06-23 Sony Corp Video signal processing circuit

Also Published As

Publication number Publication date
EP0139470A2 (de) 1985-05-02
JPS60232707A (ja) 1985-11-19
GB8324697D0 (en) 1983-10-19
EP0139470A3 (de) 1985-07-31
KR850002724A (ko) 1985-05-15
AU3298284A (en) 1985-03-21
ES8606766A1 (es) 1986-04-16
ES535895A0 (es) 1986-04-16
BR8404620A (pt) 1985-08-06
ZA847216B (en) 1985-04-24
GB2148636A (en) 1985-05-30

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