GB854858A - Improvements in or relating to time base circuits for cathode-ray oscillographs - Google Patents

Improvements in or relating to time base circuits for cathode-ray oscillographs

Info

Publication number
GB854858A
GB854858A GB5602/57A GB560257A GB854858A GB 854858 A GB854858 A GB 854858A GB 5602/57 A GB5602/57 A GB 5602/57A GB 560257 A GB560257 A GB 560257A GB 854858 A GB854858 A GB 854858A
Authority
GB
United Kingdom
Prior art keywords
time base
valve
voltage
generator
circuit
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
GB5602/57A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB854858A publication Critical patent/GB854858A/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
    • H03K4/12—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 voltage is produced across a capacitor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/20—Cathode-ray oscilloscopes
    • G01R13/22—Circuits therefor
    • G01R13/32—Circuits for displaying non-recurrent functions such as transients; Circuits for triggering; Circuits for synchronisation; Circuits for time-base expansion

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)

Abstract

854,858. Saw-tooth generating circuits; cathoderay oscilloscopes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 19, 1957 [Feb. 22,1956], No. 5602/57. Classes 40(6) and 40(7). In a time base circuit for a cathode-ray oscillograph, the deflection velocity is increased when the instantaneous value of the displayed voltage or its time derivative exceeds a certain value. As shown, valves 1, 2, 3 constitute a free-running time base wherein the velocity is governed by the anode current of the charging valve 1 which is controlled by the variable resistor 9 or the bias source 10. The circuit is synchronized by a pulse derived from the display waveform (terminals 13) by a pulse generator 12 and applied to the suppressor of valve 3, At the end of each sweep the time base capacitor 4 is discharged through valve 2 which is regeneratively coupled to valve 3. When the input waveform exceeds a certain level, the device 14 (not described) increases the suppressor voltage of valve 1 thus accelerating the sweep. The device 14 may contain a differentiating circuit to enable the expansion to be initiated by excessive rate of change of input voltage. The output of device 14 may alternatively be fed to a separate high-speed time base generator, the output voltage of which is superposed on that of the first saw-tooth generator.
GB5602/57A 1956-02-22 1957-02-19 Improvements in or relating to time base circuits for cathode-ray oscillographs Expired GB854858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL346286X 1956-02-22

Publications (1)

Publication Number Publication Date
GB854858A true GB854858A (en) 1960-11-23

Family

ID=19784906

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5602/57A Expired GB854858A (en) 1956-02-22 1957-02-19 Improvements in or relating to time base circuits for cathode-ray oscillographs

Country Status (2)

Country Link
CH (1) CH346286A (en)
GB (1) GB854858A (en)

Also Published As

Publication number Publication date
CH346286A (en) 1960-05-15

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