GB520584A - Improvements in picture transmission systems - Google Patents

Improvements in picture transmission systems

Info

Publication number
GB520584A
GB520584A GB3083338A GB3083338A GB520584A GB 520584 A GB520584 A GB 520584A GB 3083338 A GB3083338 A GB 3083338A GB 3083338 A GB3083338 A GB 3083338A GB 520584 A GB520584 A GB 520584A
Authority
GB
United Kingdom
Prior art keywords
transmission systems
amplitude
grid
resistance
picture transmission
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
GB3083338A
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
Application filed by Pye Ltd filed Critical Pye Ltd
Priority to GB3083338A priority Critical patent/GB520584A/en
Publication of GB520584A publication Critical patent/GB520584A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)

Abstract

520,584. Automatic gain control. JONES, W., and PYE, Ltd. Oct. 25, 1938, No. 30833. [Class 40 (v)] The amplitude of a television synchronizing impulse is a measure of the received carrier and is used to control the gain of the receiver. The video signal is applied over condenser C1 and resistance R1 to a valve V, the grid of which is biassed to prevent conduction. During the synchronizing interval, the grid is made positive, and a potential is developed across resistance R2 proportional to the amplitude of the impulse, and is used to effect the gain control.
GB3083338A 1938-10-25 1938-10-25 Improvements in picture transmission systems Expired GB520584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3083338A GB520584A (en) 1938-10-25 1938-10-25 Improvements in picture transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3083338A GB520584A (en) 1938-10-25 1938-10-25 Improvements in picture transmission systems

Publications (1)

Publication Number Publication Date
GB520584A true GB520584A (en) 1940-04-29

Family

ID=10313852

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3083338A Expired GB520584A (en) 1938-10-25 1938-10-25 Improvements in picture transmission systems

Country Status (1)

Country Link
GB (1) GB520584A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654799A (en) * 1948-08-26 1953-10-06 Rca Corp Keyed automatic gain control with keying pulse limiter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654799A (en) * 1948-08-26 1953-10-06 Rca Corp Keyed automatic gain control with keying pulse limiter

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