GB1158141A - Transistorized Signal Separator - Google Patents

Transistorized Signal Separator

Info

Publication number
GB1158141A
GB1158141A GB1742165A GB1742165A GB1158141A GB 1158141 A GB1158141 A GB 1158141A GB 1742165 A GB1742165 A GB 1742165A GB 1742165 A GB1742165 A GB 1742165A GB 1158141 A GB1158141 A GB 1158141A
Authority
GB
United Kingdom
Prior art keywords
pulses
during
pulse
transistors
collector
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
GB1742165A
Inventor
James Edward Attew
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.)
AUTOMATIC INFORMATION DATA SER
Original Assignee
AUTOMATIC INFORMATION DATA SER
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 AUTOMATIC INFORMATION DATA SER filed Critical AUTOMATIC INFORMATION DATA SER
Priority to GB1742165A priority Critical patent/GB1158141A/en
Publication of GB1158141A publication Critical patent/GB1158141A/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
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa

Landscapes

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

Abstract

1,158,141. Transistor pulse discriminating circuits. AUTOMATIC INFORMATION DATA SERVICE Ltd. 22 July, 1966 [26 April, 1965], No. 17421/65. Heading H3T. A pulse width discriminating circuit, particularly for separating line and field pulses in television systems, comprises a compound pair of transistors VT 1 , VT 2 feeding an emittercoupled pair of transistors VT 3 , VT 4 having a resistance capacitance time constant such that shorter duration (line) pulses can be derived from the collector of VT 3 and longer duration (field) pulses from the collector of VT 4 . The signals at 11 passed by capacitor C 1 are D.C. restored by the base current of VT 1 . Capacitor C 2 is charged negatively via VT 3 during the non-pulse periods and discharged via R 4 during the pulse periods, the time constant being such that C 2 is only discharged sufficiently to render VT 4 conductive during the longer duration field pulses.
GB1742165A 1965-04-26 1965-04-26 Transistorized Signal Separator Expired GB1158141A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1742165A GB1158141A (en) 1965-04-26 1965-04-26 Transistorized Signal Separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1742165A GB1158141A (en) 1965-04-26 1965-04-26 Transistorized Signal Separator

Publications (1)

Publication Number Publication Date
GB1158141A true GB1158141A (en) 1969-07-16

Family

ID=10094919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1742165A Expired GB1158141A (en) 1965-04-26 1965-04-26 Transistorized Signal Separator

Country Status (1)

Country Link
GB (1) GB1158141A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222722A1 (en) * 1973-03-20 1974-10-18 Rca Corp
FR2391615A1 (en) * 1977-05-16 1978-12-15 Matsushita Electric Ind Co Ltd LINE RECOGNITION CIRCUIT FOR TELEVISION SIGNAL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222722A1 (en) * 1973-03-20 1974-10-18 Rca Corp
FR2391615A1 (en) * 1977-05-16 1978-12-15 Matsushita Electric Ind Co Ltd LINE RECOGNITION CIRCUIT FOR TELEVISION SIGNAL

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees