GB782283A - Electronic pulse generator - Google Patents

Electronic pulse generator

Info

Publication number
GB782283A
GB782283A GB1847/55A GB184755A GB782283A GB 782283 A GB782283 A GB 782283A GB 1847/55 A GB1847/55 A GB 1847/55A GB 184755 A GB184755 A GB 184755A GB 782283 A GB782283 A GB 782283A
Authority
GB
United Kingdom
Prior art keywords
cathode
tube
control grid
voltage
potential
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
GB1847/55A
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.)
Ebauches SA
Original Assignee
Ebauches SA
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 Ebauches SA filed Critical Ebauches SA
Publication of GB782283A publication Critical patent/GB782283A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/04—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback
    • H03K3/05—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback
    • H03K3/06—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/08—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of vacuum tubes only, with positive feedback using means other than a transformer for feedback using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/43—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of beam deflection tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Particle Accelerators (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

782,283. Pulse and sawtooth generating circuits. EBAUCHES SOC. ANON. Jan. 21, 1955 [Jan. 22, 1954; Jan. 6, 1955], No. 1847/55. Class 40 (6). In an electronic pulse generator for producing steep-sided pulses the positive-going edges are obtained by a coupling between the control grid and auxiliary cathode of a secondary-emission discharge tube. Fig. 1 shows a pulse generator comprising a secondary-emission tube T1, the auxiliary cathode K2 of which is coupled to the control grid g1 via capacitor C, the tube being initially cut off by returning its cathode K1 to a positive potential. When the tube is rendered conducting, for example by raising the cathode potential, current flows from the auxiliary cathode K2 so that its potential rises rapidly, this rise is transmitted via capacitor C to the control grid g1 the action being cumulative so that a positive-going voltage step is produced at cathode K1, Fig. 2 (not shown), until the back E.M.F. generated across inductor L causes a drop in potential at auxiliary cathode K2 and thus at control grid g1 so that the tube is cut-off and the voltage at the cathode K1 rapidly falls. The fall in voltage at grid g1 is limited by catcher diode D and the amplitude of the output at auxiliary-cathode K2 is limited by resistor R. In a modification shown in Fig. 3 a pentode T2, operating as a constant current device, constitutes the cathode load for secondary-emission tube T1 so that a sawtooth voltage, Fig. 4 (not shown), is generated at the cathode K1. The anode current of tube T2 may be suppressed during the positive pulse front on cathode K1 by a coupling between the control grid g1 of tube T2 and the anode of tube T1. The circuit may be synchronized by applying a control voltage to tube T2 at point Vg or the circuit may function as a frequency-divider, Fig. 6 (not shown.). In a modification shown in Fig. 8 the auxiliary cathode K2 and the control grids of tubes T1 and T2 are tapped on to a potential divider connected across the H.T. supply and a capacitor Cc is periodically charged through an impedance Z by the voltage rise at cathode K1 and discharged through tube T2 output pulses are obtained at lead S after passing filter C1, C2, L, Ra. Positive synchronizing pulses are applied to the control grid g1 of pentode T2 and the oscillating frequency of the circuit may be controlled by varying the resistor Rk or capacitor Cc so that by adjustment of Rk the tube T1 will conduct after n control pulses so that a frequency division of n is obtained. In a modification, Fig. 9 (not shown), the suppressor grid of the secondary-emission tube is connected to the potential divider a few volts above its control grid and the auxiliary cathode is connected to a point such that most rapid reaction is obtained.
GB1847/55A 1954-01-22 1955-01-21 Electronic pulse generator Expired GB782283A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH782283X 1954-01-22

Publications (1)

Publication Number Publication Date
GB782283A true GB782283A (en) 1957-09-04

Family

ID=4536321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1847/55A Expired GB782283A (en) 1954-01-22 1955-01-21 Electronic pulse generator

Country Status (5)

Country Link
BE (1) BE534902A (en)
CH (2) CH334110A (en)
DE (1) DE1039097B (en)
FR (1) FR1131863A (en)
GB (1) GB782283A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE690643C (en) * 1936-05-25 1940-05-03 Harry Raymond Lubcke Tilting vibration generator, especially for television cathode and anode three grids are arranged
GB485120A (en) * 1936-11-16 1938-05-16 Standard Telephones Cables Ltd Improvements in or relating to relaxation oscillation generators
BE468741A (en) * 1939-11-14

Also Published As

Publication number Publication date
DE1039097B (en) 1958-09-18
BE534902A (en)
FR1131863A (en) 1957-02-28
CH342990A (en) 1959-12-15
CH334110A (en) 1958-11-15

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