GB993543A - Improvements in or relating to time base circuits - Google Patents

Improvements in or relating to time base circuits

Info

Publication number
GB993543A
GB993543A GB1838663A GB1838663A GB993543A GB 993543 A GB993543 A GB 993543A GB 1838663 A GB1838663 A GB 1838663A GB 1838663 A GB1838663 A GB 1838663A GB 993543 A GB993543 A GB 993543A
Authority
GB
United Kingdom
Prior art keywords
sawtooth
time base
valve
setting
output stage
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
GB1838663A
Inventor
Brian Ernest Attwood
Peter Antony Rayment
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB1838663A priority Critical patent/GB993543A/en
Publication of GB993543A publication Critical patent/GB993543A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H03K4/39—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier
    • H03K4/43—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier combined with means for generating the driving pulses

Landscapes

  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

993,543. Sawtooth circuits. MULLARD Ltd. April 30, 1964 [May 9, 1963], No. 18386/63. Heading H3P. In a field time base circuit for television apparatus, the sawtooth oscillator is coupled via a direct current path to the grid of the output stage, a potentiometer R4 being provided so as to permit simultaneous variation of the sawtooth amplitude and D.C. bias on the output stage. The setting of R4 is increased as the valve V3 becomes aged so as to allow for reduction in slope of V3 and simultaneously prevent the valve being driven beyond its cut-off point. As described, the increase in setting of R4 also increases the amount of linearity correction feedback applied via R11. V1, V2 may be replaced by a PNPN device.
GB1838663A 1963-05-09 1963-05-09 Improvements in or relating to time base circuits Expired GB993543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1838663A GB993543A (en) 1963-05-09 1963-05-09 Improvements in or relating to time base circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1838663A GB993543A (en) 1963-05-09 1963-05-09 Improvements in or relating to time base circuits

Publications (1)

Publication Number Publication Date
GB993543A true GB993543A (en) 1965-05-26

Family

ID=10111570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1838663A Expired GB993543A (en) 1963-05-09 1963-05-09 Improvements in or relating to time base circuits

Country Status (1)

Country Link
GB (1) GB993543A (en)

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