GB476336A - Improvements in or relating to electric circuits for the production of current of sawtooth wave form - Google Patents

Improvements in or relating to electric circuits for the production of current of sawtooth wave form

Info

Publication number
GB476336A
GB476336A GB1262436A GB1262436A GB476336A GB 476336 A GB476336 A GB 476336A GB 1262436 A GB1262436 A GB 1262436A GB 1262436 A GB1262436 A GB 1262436A GB 476336 A GB476336 A GB 476336A
Authority
GB
United Kingdom
Prior art keywords
coil
current
valve
voltage
rectifier
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
GB1262436A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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
Priority to DET45259D priority Critical patent/DE753804C/en
Application filed by Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Priority to GB1262436A priority patent/GB476336A/en
Priority to US77717A priority patent/US2147229A/en
Publication of GB476336A publication Critical patent/GB476336A/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

Landscapes

  • Rectifiers (AREA)

Abstract

476,336. Valve generating circuits. CACKETT, F. W. (Telefunken Ges. f³r Drahtlose Telegraphie) May 4, 1936, No. 12624. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 4, 1936.] [Class 40 (v)] Saw-tooth current is generated in the de flecting-coil 12 of a cathode-ray tube by connecting the coil in the plate circuit of a valve 10 in parallel with a rectifier 13 and voltage source 14, and by applying to the grid of the valve a voltage of saw-tooth form the slope of which is such that the plate current of the valve rises with the slope desired for the coil current. When the valve 10 is blocked, the current through the coil 12, which had previously been in the upward direction on the diagram and steadily rising, suddenly reverses, the coil tending to oscillate at its own natural frequency. After a half-wave of this oscillation (which constitutes the flyback portion of the saw-tooth current) the voltage across the coil resumes the same direction as it had before the valve was blocked. This voltage predominates over that of the source 14 and the rectifier 13 becomes conductive. The self-oscillation of the coil 12 ceases, and the downward current in it gradually falls towards zero. Before reaching zero value, the valve 10 is gradually opened by the rising slope of the voltage applied to its grid. The plate source 11 now supplies plate current to the valve, first through the rectifier 13 only, and later through the rectifier and the coil 12 in the upward direction. During the remainder of the cycle the current through the rectifier is constant and the current in coil 12 rises at the same rate as the rise in voltage of the valve grid. The Specification includes explanatory diagrams, and considers the effect of substantial resistance in the coil 12. Specification 400,976 is referred to.
GB1262436A 1935-05-04 1936-05-04 Improvements in or relating to electric circuits for the production of current of sawtooth wave form Expired GB476336A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DET45259D DE753804C (en) 1935-05-04 1935-05-04 Circuit arrangement for generating saw-tooth-shaped current curves
GB1262436A GB476336A (en) 1936-05-04 1936-05-04 Improvements in or relating to electric circuits for the production of current of sawtooth wave form
US77717A US2147229A (en) 1935-05-04 1936-05-04 Oscillation producing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1262436A GB476336A (en) 1936-05-04 1936-05-04 Improvements in or relating to electric circuits for the production of current of sawtooth wave form

Publications (1)

Publication Number Publication Date
GB476336A true GB476336A (en) 1937-12-06

Family

ID=10008114

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1262436A Expired GB476336A (en) 1935-05-04 1936-05-04 Improvements in or relating to electric circuits for the production of current of sawtooth wave form

Country Status (1)

Country Link
GB (1) GB476336A (en)

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