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GB525969A - Improvements in or relating to synchronised time base circuits - Google Patents

Improvements in or relating to synchronised time base circuits

Info

Publication number
GB525969A
GB525969A GB708739A GB708739A GB525969A GB 525969 A GB525969 A GB 525969A GB 708739 A GB708739 A GB 708739A GB 708739 A GB708739 A GB 708739A GB 525969 A GB525969 A GB 525969A
Authority
GB
United Kingdom
Prior art keywords
amplitude
valve
frequency
relating
condenser
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
GB708739A
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.)
Kolster Brandes Ltd
Original Assignee
Kolster Brandes 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 BE476198D priority Critical patent/BE476198A/xx
Application filed by Kolster Brandes Ltd filed Critical Kolster Brandes Ltd
Priority to GB708739A priority patent/GB525969A/en
Priority to FR863358D priority patent/FR863358A/en
Publication of GB525969A publication Critical patent/GB525969A/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
    • H03K4/16—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 using a single tube with positive feedback through transformer, e.g. blocking oscillator

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

525,969. Valve generating circuits. KOLSTERBRANDES, Ltd., and SMYTH, C. N. March 3, 1939, No. 7087. [Class 40 (v)] The slow-stroke circuit of a back-coupled relaxation-oscillator has an invariable time-constant, but the voltage at which free discharge of the condenser takes place is made variable. As shown the condenser C, is charged slowly over invariable resistance R 1' and is discharged when synchronizing signals are received over a hard valve V. The anode voltage of valve V is adjustable by potentiometer R 3 , R 4 so that the frequency and amplitude of free oscillation can be varied, but this alteration affects neither the frequency nor the amplitude of the synchronized oscillations. Amplitude of the output oscillations is controlled by the provision of a variable gain amplifier or variable attenuator.
GB708739A 1939-03-03 1939-03-03 Improvements in or relating to synchronised time base circuits Expired GB525969A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE476198D BE476198A (en) 1939-03-03
GB708739A GB525969A (en) 1939-03-03 1939-03-03 Improvements in or relating to synchronised time base circuits
FR863358D FR863358A (en) 1939-03-03 1940-02-09 Synchronized time base circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB708739A GB525969A (en) 1939-03-03 1939-03-03 Improvements in or relating to synchronised time base circuits

Publications (1)

Publication Number Publication Date
GB525969A true GB525969A (en) 1940-09-09

Family

ID=9826356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB708739A Expired GB525969A (en) 1939-03-03 1939-03-03 Improvements in or relating to synchronised time base circuits

Country Status (3)

Country Link
BE (1) BE476198A (en)
FR (1) FR863358A (en)
GB (1) GB525969A (en)

Also Published As

Publication number Publication date
FR863358A (en) 1941-03-31
BE476198A (en)

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