GB1503982A - Gain control circuit - Google Patents

Gain control circuit

Info

Publication number
GB1503982A
GB1503982A GB9052/75A GB905275A GB1503982A GB 1503982 A GB1503982 A GB 1503982A GB 9052/75 A GB9052/75 A GB 9052/75A GB 905275 A GB905275 A GB 905275A GB 1503982 A GB1503982 A GB 1503982A
Authority
GB
United Kingdom
Prior art keywords
gain control
march
fet
control circuit
gain
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.)
Expired
Application number
GB9052/75A
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.)
Indesit Industria Elettrodomestici Italiana SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana SpA
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 Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of GB1503982A publication Critical patent/GB1503982A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

1503982 Gain control circuits INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA SpA 5 March 1975 [8 March 1974] 9052/75 Heading H4R The gain of a semi-conductor 22 is controlled by varying the resistance of an FET 27 in a series D.C. path with a resistor 25, <SP>.</SP>26 between the semiconductor's common electrode and a reference point. The circuit minimizes phase shifts in colour subcarrier frequency TV signals. FET control is effected by comparison at 29 of a threshold voltage set by 31, 32 and the detected 35 output of amplifier 43.
GB9052/75A 1974-03-08 1975-03-05 Gain control circuit Expired GB1503982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67649/74A IT1009241B (en) 1974-03-08 1974-03-08 CIRCUIT FOR THE CONTROL OF THE DAGNO GUA

Publications (1)

Publication Number Publication Date
GB1503982A true GB1503982A (en) 1978-03-15

Family

ID=11304208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9052/75A Expired GB1503982A (en) 1974-03-08 1975-03-05 Gain control circuit

Country Status (4)

Country Link
DE (1) DE2509981A1 (en)
GB (1) GB1503982A (en)
IT (1) IT1009241B (en)
NL (1) NL7502766A (en)

Also Published As

Publication number Publication date
NL7502766A (en) 1975-09-10
DE2509981A1 (en) 1975-09-11
IT1009241B (en) 1976-12-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee