GB1381894A - Television receivers - Google Patents

Television receivers

Info

Publication number
GB1381894A
GB1381894A GB3951672A GB3951672A GB1381894A GB 1381894 A GB1381894 A GB 1381894A GB 3951672 A GB3951672 A GB 3951672A GB 3951672 A GB3951672 A GB 3951672A GB 1381894 A GB1381894 A GB 1381894A
Authority
GB
United Kingdom
Prior art keywords
sound
signal
aug
amplification
trap
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
GB3951672A
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn Electrical Industries 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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Priority to GB3951672A priority Critical patent/GB1381894A/en
Priority to ZA735659A priority patent/ZA735659B/en
Priority to AU59561/73A priority patent/AU470011B2/en
Priority to DE19732342620 priority patent/DE2342620A1/en
Priority to NL7311655A priority patent/NL7311655A/xx
Publication of GB1381894A publication Critical patent/GB1381894A/en
Expired legal-status Critical Current

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
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • H04N5/62—Intercarrier circuits, i.e. heterodyning sound and vision carriers
    • 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

Abstract

1381894 Multiplex radio signalling THORN ELECTRICAL INDUSTRIES Ltd 15 Aug 1973 [24 Aug 1972] 39516/72 Heading H4L In an intercarrier sound television receiver, means controlled by the A.G.C. signal in the receiver increase the amplification of the sound signal relative to that of the vision signal under weak signal conditions as compared with its amplification under normal signal conditions. In one arrangement, Fig. 4 (not shown) a sound carrier trap common to both the sound and vision circuits is determined by means of a capacitor connected across the sound trap by a transistor which is switched on when the A.G.C. falls below a predetermined level. In an alternative arrangement, Fig. 6 (not shown) a diode becomes conductive when the A.G.C. potential falls and damps the timed circuit forming the sound carrier trap.
GB3951672A 1972-08-24 1972-08-24 Television receivers Expired GB1381894A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB3951672A GB1381894A (en) 1972-08-24 1972-08-24 Television receivers
ZA735659A ZA735659B (en) 1972-08-24 1973-08-20 Improvements in television receivers
AU59561/73A AU470011B2 (en) 1972-08-24 1973-08-23 Improvements in television receivers
DE19732342620 DE2342620A1 (en) 1972-08-24 1973-08-23 DIFFERENTIAL CARRIER TV RECEIVER
NL7311655A NL7311655A (en) 1972-08-24 1973-08-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3951672A GB1381894A (en) 1972-08-24 1972-08-24 Television receivers

Publications (1)

Publication Number Publication Date
GB1381894A true GB1381894A (en) 1975-01-29

Family

ID=10409986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3951672A Expired GB1381894A (en) 1972-08-24 1972-08-24 Television receivers

Country Status (5)

Country Link
AU (1) AU470011B2 (en)
DE (1) DE2342620A1 (en)
GB (1) GB1381894A (en)
NL (1) NL7311655A (en)
ZA (1) ZA735659B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490743A (en) * 1982-05-17 1984-12-25 Zenith Electronics Corporation Intercarrier signal detection circuit for a television receiver
WO2005067286A1 (en) * 2003-12-22 2005-07-21 Thomson Licensing Apparatus and method for providing automatic gain control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966281A (en) * 1982-10-06 1984-04-14 Mitsubishi Electric Corp Sound first detector
GB2148652B (en) * 1983-09-15 1987-09-09 Sinclair Res Ltd Television receivers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490743A (en) * 1982-05-17 1984-12-25 Zenith Electronics Corporation Intercarrier signal detection circuit for a television receiver
WO2005067286A1 (en) * 2003-12-22 2005-07-21 Thomson Licensing Apparatus and method for providing automatic gain control

Also Published As

Publication number Publication date
NL7311655A (en) 1974-02-26
DE2342620A1 (en) 1974-03-07
AU5956173A (en) 1975-02-27
AU470011B2 (en) 1976-02-26
ZA735659B (en) 1974-07-31

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19930814