GB776062A - Improvements in or relating to television receivers - Google Patents

Improvements in or relating to television receivers

Info

Publication number
GB776062A
GB776062A GB18154A GB18154A GB776062A GB 776062 A GB776062 A GB 776062A GB 18154 A GB18154 A GB 18154A GB 18154 A GB18154 A GB 18154A GB 776062 A GB776062 A GB 776062A
Authority
GB
United Kingdom
Prior art keywords
common
stages
control
rectifier
sound
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
GB18154A
Inventor
John Edward Cope
Donald Henry Fisher
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.)
Pye Electronic Products Ltd
Original Assignee
Pye 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
Priority to BE534419D priority Critical patent/BE534419A/xx
Application filed by Pye Ltd filed Critical Pye Ltd
Priority to GB18154A priority patent/GB776062A/en
Priority to FR1116607D priority patent/FR1116607A/en
Publication of GB776062A publication Critical patent/GB776062A/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
    • H04N5/52—Automatic gain control
    • H04N5/53—Keyed 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
    • H04N5/52—Automatic gain control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

776,062. Automatic gain control; multiplex radio signalling. PYE, Ltd. Dec. 21, 1954 [Jan. 4, 1954], No. 181/54. Class 40(5) In a television receiver the gain of those stages which are common to sound and vision is controlled from both sound and vision channels. In a receiver comprising common stages 1, Fig. 1 followed by separate sound and vision channels 3, 4 respectively, each of which is provided with its own A.G.C. circuit 6, 7 respectively, the two control potentials are combined by means of resistors R1; 2 the voltage at the join of which is applied to the common stages 1. The proportion in which the two control potentials are combined is determined by the ratio of the resistances R1, 2. A common filter condenser C may be used, or alternatively an R-C filter network, Fig. 2 (not shown) or separate networks in each A.G.C. line, Fig. 3 (not shown). The control on the common stages is delayed by means of a rectifier 11 connecting the common A.G.C. line to ground and provided with a positive delay bias via a resistor R3. One of the resistors R1, 2 may be replaced by a rectifier, Figs. 4, 5 (not shown) in which case the control voltage applied to the initial stages is the stronger or weaker of the two individual control voltages according as the rectifier is poled.
GB18154A 1954-01-04 1954-01-04 Improvements in or relating to television receivers Expired GB776062A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE534419D BE534419A (en) 1954-01-04
GB18154A GB776062A (en) 1954-01-04 1954-01-04 Improvements in or relating to television receivers
FR1116607D FR1116607A (en) 1954-01-04 1954-12-28 Improvements to television receivers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18154A GB776062A (en) 1954-01-04 1954-01-04 Improvements in or relating to television receivers

Publications (1)

Publication Number Publication Date
GB776062A true GB776062A (en) 1957-06-05

Family

ID=9699830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18154A Expired GB776062A (en) 1954-01-04 1954-01-04 Improvements in or relating to television receivers

Country Status (3)

Country Link
BE (1) BE534419A (en)
FR (1) FR1116607A (en)
GB (1) GB776062A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1106801B (en) * 1958-10-30 1961-05-18 Blaupunkt Werke Gmbh TV receiver with keyed gain control
US10389453B2 (en) 2009-12-15 2019-08-20 Interdigital Madison Patent Holdings Multiplexed RFAGC for frequency diversity receivers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1106801B (en) * 1958-10-30 1961-05-18 Blaupunkt Werke Gmbh TV receiver with keyed gain control
US10389453B2 (en) 2009-12-15 2019-08-20 Interdigital Madison Patent Holdings Multiplexed RFAGC for frequency diversity receivers

Also Published As

Publication number Publication date
FR1116607A (en) 1956-05-09
BE534419A (en)

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