GB645145A - Improvements relating to time base circuits - Google Patents

Improvements relating to time base circuits

Info

Publication number
GB645145A
GB645145A GB3142547A GB3142547A GB645145A GB 645145 A GB645145 A GB 645145A GB 3142547 A GB3142547 A GB 3142547A GB 3142547 A GB3142547 A GB 3142547A GB 645145 A GB645145 A GB 645145A
Authority
GB
United Kingdom
Prior art keywords
valve
sawtooth
voltage
terminal
pulse
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
GB3142547A
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.)
ALEXANDER MERRIE HARDIE
Metropolitan Vickers Electrical Co Ltd
Original Assignee
ALEXANDER MERRIE HARDIE
Metropolitan Vickers Electrical Co 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
Priority to US653504A priority Critical patent/US2477110A/en
Application filed by ALEXANDER MERRIE HARDIE, Metropolitan Vickers Electrical Co Ltd filed Critical ALEXANDER MERRIE HARDIE
Priority to GB3142547A priority patent/GB645145A/en
Priority to FR975439D priority patent/FR975439A/en
Publication of GB645145A publication Critical patent/GB645145A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K25/00—Pulse counters with step-by-step integration and static storage; Analogous frequency dividers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/20—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/02—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform
    • H03K4/023—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform by repetitive charge or discharge of a capacitor, analogue generators
    • 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
    • H03K4/86—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements gas-filled tubes or spark-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0002—Construction arrangements of electrode systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

645,145. Sawtooth generating circuits. HARDIE, A. M., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Nov. 27, 1947, No. 31425. [Class 40 (vi)] In a sawtooth generator the rise or fall of voltage or current is periodically arrested during each sweep period so that the sawtooth wave has a stepped sweep portion. Fig. 1 shows a sawtooth generator in which the suppressor grid of valve V1 is normally biassed so that the valve only conducts when a positive going pulse is applied to terminal 2. When valve V1 is rendered conducting capacitor C1 charges linearly through the valve until a negative-going pulse is applied at terminal 1 when valve V1 is cut-off and the voltage at point A remains constant. When the pulse terminates, capacitor C1 again continues to charge and the process is repeated until at a point depending on the setting of potentiometer P1 the gas-filled valve V2 conducts and discharges capacitor C1 and the cycle is repeated. The voltage at point A thus follows a sawtooth waveform with a stepped edge as shown in Fig. 2b. If the pulse applied to terminal 2 is of equal duration and in phase with the sawtooth waveform, the truncated sawtooth waveform shown in Fig. 2d is generated. The diodes V3 and V4 act as D.C. restorers and resistor R4 may be adjusted to linearise the sweep.
GB3142547A 1946-03-11 1947-11-27 Improvements relating to time base circuits Expired GB645145A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US653504A US2477110A (en) 1946-03-11 1946-03-11 Electrode structure and device containing the same
GB3142547A GB645145A (en) 1947-11-27 1947-11-27 Improvements relating to time base circuits
FR975439D FR975439A (en) 1947-11-27 1948-11-25 Staircase voltage generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3142547A GB645145A (en) 1947-11-27 1947-11-27 Improvements relating to time base circuits

Publications (1)

Publication Number Publication Date
GB645145A true GB645145A (en) 1950-10-25

Family

ID=10322907

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3142547A Expired GB645145A (en) 1946-03-11 1947-11-27 Improvements relating to time base circuits

Country Status (2)

Country Link
FR (1) FR975439A (en)
GB (1) GB645145A (en)

Also Published As

Publication number Publication date
FR975439A (en) 1951-03-05

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