GB959694A - Synchronising pulse separator circuits - Google Patents

Synchronising pulse separator circuits

Info

Publication number
GB959694A
GB959694A GB578261A GB578261A GB959694A GB 959694 A GB959694 A GB 959694A GB 578261 A GB578261 A GB 578261A GB 578261 A GB578261 A GB 578261A GB 959694 A GB959694 A GB 959694A
Authority
GB
United Kingdom
Prior art keywords
transistor
synchronizing
base
circuit
constant
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
GB578261A
Inventor
Henry Arthur Mcghee
Alec Raymond Brown
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 GB578261A priority Critical patent/GB959694A/en
Priority to ES0274423A priority patent/ES274423A1/en
Publication of GB959694A publication Critical patent/GB959694A/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
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)
  • Picture Signal Circuits (AREA)

Abstract

959,694. Television; transistor clipper circuits. PYE Ltd. Feb. 5, 1962 [Feb. 16, 1961], No. 5782/61. Headings H3T and H4F. Relates to a circuit for separating synchronizing pulses from a composite television waveform utilizing a transistor TR1 to the base of which is fed the television waveform with the synchronizing pulses negative going, the transistor being biased via resistor R4 so as to be cut-off during picture signal periods and to conduct in response to synchronizing pulses. In accordance with the invention the time constant R6, C2 of the base circuit is arranged to be substantially equal to the time constant R3, C1 of the emitter circuit. This equalization of time constants is said to maintain the emitter-base D.C. potential difference constant during the frame pulse synchronizing period and ensures a constant amplitude pulse output during both line and frame synchronizing pulse periods
GB578261A 1961-02-16 1961-02-16 Synchronising pulse separator circuits Expired GB959694A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB578261A GB959694A (en) 1961-02-16 1961-02-16 Synchronising pulse separator circuits
ES0274423A ES274423A1 (en) 1961-02-16 1962-02-08 Synchronising pulse separator circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB578261A GB959694A (en) 1961-02-16 1961-02-16 Synchronising pulse separator circuits

Publications (1)

Publication Number Publication Date
GB959694A true GB959694A (en) 1964-06-03

Family

ID=9802517

Family Applications (1)

Application Number Title Priority Date Filing Date
GB578261A Expired GB959694A (en) 1961-02-16 1961-02-16 Synchronising pulse separator circuits

Country Status (2)

Country Link
ES (1) ES274423A1 (en)
GB (1) GB959694A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629501A (en) * 1968-10-21 1971-12-21 Philips Corp Synchronizing separator for separating synchronizing pulses from a composite video signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629501A (en) * 1968-10-21 1971-12-21 Philips Corp Synchronizing separator for separating synchronizing pulses from a composite video signal

Also Published As

Publication number Publication date
ES274423A1 (en) 1962-05-01

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