GB581613A - Improvements in or relating to oscillation generators - Google Patents

Improvements in or relating to oscillation generators

Info

Publication number
GB581613A
GB581613A GB1773044A GB1773044A GB581613A GB 581613 A GB581613 A GB 581613A GB 1773044 A GB1773044 A GB 1773044A GB 1773044 A GB1773044 A GB 1773044A GB 581613 A GB581613 A GB 581613A
Authority
GB
United Kingdom
Prior art keywords
voltage
pentode
cathode
grid
anode
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
GB1773044A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1773044A priority Critical patent/GB581613A/en
Priority to FR934176D priority patent/FR934176A/en
Publication of GB581613A publication Critical patent/GB581613A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K4/00Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/12Generating 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
    • H03K4/18Generating 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 exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Television Scanning (AREA)

Abstract

581,613. Pulse generating circuits. STANDARD TELEPHONES & CABLES, Ltd., and EARP, C. W. Sept. 15, 1944, No. 17730. [Class 40 (v)] A pulse generator comprises a pentode valve with regenerative condenser coupling between the anode and the control grid and with a tuned circuit in the cathode lead to synchronise the output pulses which are taken from the screen grid. In Fig. 1, an initial flow of anode current through pentode 1, produces a fall in anode voltage which reacts on the control grid through condenser 12. The fall in grid voltage reduces the screen current, and as this constitutes most of the cathode current, the cathode voltage falls by reason of bias resistance 6. As cathode voltage falls below fixed suppressor grid voltage anode current increases, the corresponding fall in anode voltage being transferred to the control grid through condenser 12 until valve current is completely cut off. Grid voltage is restored through leak resistance 13 and rises until the cathode voltage again exceeds the suppressor grid voltage, when cycle is repeated. Pulses produced when the space current is cut off " ring " resonant circuit 7, 8 so that an alternating voltage is superimposed on the cathode voltage and the frequency of the pulses is determined exactly by the ringing frequency. A diode 14, prevents control grid voltage from exceeding the suppressor grid voltage. In synchronising this circuit by means of a pulse train, the synchronising pulses may be applied at 17 or, to eliminate the effect of interference, through a gating circuit. Fig. 4 shows a gating pentode 21, biassed to be normally blocked and unblocked by a pulse from the screen of the oscillator pentode, suitably delayed to synchronise with the arrival of succeeding pulses at the grid of pentode 21. The amplified pulse is applied through condenser 34 to the anode of the oscillator pentode for synchronisation purposes. In a further modification, an amplified train of pulses from the gating pentode 21 is applied to inductance 7 of the ringing circuit in the oscillator cathode circuit by means of an inductively coupled winding (Fig. 5, not shown).
GB1773044A 1944-09-15 1944-09-15 Improvements in or relating to oscillation generators Expired GB581613A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1773044A GB581613A (en) 1944-09-15 1944-09-15 Improvements in or relating to oscillation generators
FR934176D FR934176A (en) 1944-09-15 1946-10-04 Improvements to oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1773044A GB581613A (en) 1944-09-15 1944-09-15 Improvements in or relating to oscillation generators

Publications (1)

Publication Number Publication Date
GB581613A true GB581613A (en) 1946-10-18

Family

ID=10100232

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1773044A Expired GB581613A (en) 1944-09-15 1944-09-15 Improvements in or relating to oscillation generators

Country Status (2)

Country Link
FR (1) FR934176A (en)
GB (1) GB581613A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116679125A (en) * 2023-06-07 2023-09-01 海安市综合检验检测中心 Strain resistance measuring circuit device for generating measured signal by using multivibrator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116679125A (en) * 2023-06-07 2023-09-01 海安市综合检验检测中心 Strain resistance measuring circuit device for generating measured signal by using multivibrator
CN116679125B (en) * 2023-06-07 2024-04-09 海安市综合检验检测中心 Strain resistance measuring circuit device for generating measured signal by using multivibrator

Also Published As

Publication number Publication date
FR934176A (en) 1948-05-13

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