GB1510066A - Automatic control of the saturation in a colour television set - Google Patents

Automatic control of the saturation in a colour television set

Info

Publication number
GB1510066A
GB1510066A GB3974976A GB3974976A GB1510066A GB 1510066 A GB1510066 A GB 1510066A GB 3974976 A GB3974976 A GB 3974976A GB 3974976 A GB3974976 A GB 3974976A GB 1510066 A GB1510066 A GB 1510066A
Authority
GB
United Kingdom
Prior art keywords
saturation
gain
controlled
amplifier
burst
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
GB3974976A
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 GB1510066A publication Critical patent/GB1510066A/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

Abstract

1510066 Television systems INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA SpA 24 Sept 1976 [9 Oct 1975] 39749/76 Heading H4F A saturation control circuit includes two serially-connected variable gain amplifiers, 6, 7. The chroma and sync. burst signals are fed to the first amplifier 6, the gain of which is controlled by a control loop including a burst gate 8, a noiseinsensitive synchronous detector 12 and a threshold circuit 15. The second amplifier 7 is gain controlled by a manual saturation control M and by the output of a colour killer 13 fed by the synchronous detector 12. It is also controlled by a control loop, including a burst gate 10, a peak detector 14 and a threshold circuit 16, which reduces the gain if the amplitude of the burst signal and any noise present exceeds the threshold, so preventing over-saturation. The second amplifier feeds a demodulator 9 giving colour signals B, R.
GB3974976A 1975-10-09 1976-09-24 Automatic control of the saturation in a colour television set Expired GB1510066A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6951475A IT1055629B (en) 1975-10-09 1975-10-09 AUTOMATIC SATURATION CONTROL IN A COLOR TELEVISION RECEIVER

Publications (1)

Publication Number Publication Date
GB1510066A true GB1510066A (en) 1978-05-10

Family

ID=11312299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3974976A Expired GB1510066A (en) 1975-10-09 1976-09-24 Automatic control of the saturation in a colour television set

Country Status (3)

Country Link
DE (1) DE2644830C2 (en)
GB (1) GB1510066A (en)
IT (1) IT1055629B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118800A (en) * 1982-03-18 1983-11-02 Rca Corp Digital television receiver automatic chroma control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62227291A (en) * 1986-03-29 1987-10-06 Toshiba Corp Automatic color saturation controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118800A (en) * 1982-03-18 1983-11-02 Rca Corp Digital television receiver automatic chroma control system
US4447826A (en) * 1982-03-18 1984-05-08 Rca Corporation Digital television receiver automatic chroma control system

Also Published As

Publication number Publication date
DE2644830C2 (en) 1986-07-10
DE2644830A1 (en) 1977-04-21
IT1055629B (en) 1982-01-11

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee