GB700453A - Improvements in sawtooth current generators - Google Patents

Improvements in sawtooth current generators

Info

Publication number
GB700453A
GB700453A GB2802948A GB2802948A GB700453A GB 700453 A GB700453 A GB 700453A GB 2802948 A GB2802948 A GB 2802948A GB 2802948 A GB2802948 A GB 2802948A GB 700453 A GB700453 A GB 700453A
Authority
GB
United Kingdom
Prior art keywords
screen grid
transformer
anode
induced voltage
circuits
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
GB2802948A
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.)
HAROLD ALFRED FAIRHURST
Murphy Radio Ltd
Original Assignee
HAROLD ALFRED FAIRHURST
Murphy Radio 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 HAROLD ALFRED FAIRHURST, Murphy Radio Ltd filed Critical HAROLD ALFRED FAIRHURST
Priority to GB2802948A priority Critical patent/GB700453A/en
Publication of GB700453A publication Critical patent/GB700453A/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
    • H03K4/28—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 a switching device
    • H03K4/32—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 a switching device combined with means for generating the driving pulses
    • H03K4/34—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 a switching device combined with means for generating the driving pulses using a single tube with positive feedback through a transformer

Landscapes

  • Generation Of Surge Voltage And Current (AREA)
  • Details Of Television Scanning (AREA)
  • Inverter Devices (AREA)

Abstract

700,453. Saw - tooth generating circuits. MURPHY RADIO, Ltd., SMITH, R. B., and FAIRHURST, H. A. Oct. 28, 1949 [Oct. 28, 1948], No. 28029/48. Class 40 (6) In a saw tooth current generator of the type comprising a screen grid valve having a transformer coupling the anode and screen grid circuits, adjustable means are provided for generating an induced voltage in the screen grid circuit as a result of a diminution of the rate of rise of anode current or diminution of screen grid current towards the end of the long flank of the saw tooth wave. This induced voltage increases the length of the long flank. The induced voltage may be provided by a variable inductor 10 in the screen grid lead, by an additional transformer with a variable core coupling the anode or screen grid circuits or by the existing transformer. In the latter case the transformer has an adjustably tapped secondary or an adjustable core. Damping resistors may be connected in series with or across the additional inductor and a synchronizing signal may be applied to the control grid of the valve. The screen grid may be connected to a positive H.T. supply. Specification 643,993 is referred to.
GB2802948A 1948-10-28 1948-10-28 Improvements in sawtooth current generators Expired GB700453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2802948A GB700453A (en) 1948-10-28 1948-10-28 Improvements in sawtooth current generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2802948A GB700453A (en) 1948-10-28 1948-10-28 Improvements in sawtooth current generators

Publications (1)

Publication Number Publication Date
GB700453A true GB700453A (en) 1953-12-02

Family

ID=10269111

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2802948A Expired GB700453A (en) 1948-10-28 1948-10-28 Improvements in sawtooth current generators

Country Status (1)

Country Link
GB (1) GB700453A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072802A (en) * 1959-01-14 1963-01-08 Burroughs Corp Pulse driver with magnetic amplitude and width control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072802A (en) * 1959-01-14 1963-01-08 Burroughs Corp Pulse driver with magnetic amplitude and width control

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