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GB577663A - Improvements relating to thermionic generators for producing scanning and like voltages - Google Patents

Improvements relating to thermionic generators for producing scanning and like voltages

Info

Publication number
GB577663A
GB577663A GB8434/44A GB843444A GB577663A GB 577663 A GB577663 A GB 577663A GB 8434/44 A GB8434/44 A GB 8434/44A GB 843444 A GB843444 A GB 843444A GB 577663 A GB577663 A GB 577663A
Authority
GB
United Kingdom
Prior art keywords
potential
anode
grid
condenser
diode
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
GB8434/44A
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.)
AC Cossor Ltd
Original Assignee
AC Cossor 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
Application filed by AC Cossor Ltd filed Critical AC Cossor Ltd
Priority to GB8434/44A priority Critical patent/GB577663A/en
Priority to US590694A priority patent/US2494865A/en
Publication of GB577663A publication Critical patent/GB577663A/en
Priority to DEC1882A priority patent/DE832028C/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
    • H03K4/20—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 tube with negative feedback by capacitor, e.g. Miller integrator
    • 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
    • H03K3/10—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 monostable

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Amplifiers (AREA)
  • Microwave Tubes (AREA)

Abstract

577,663. Saw-tooth generators ; square-wave generators. COSSOR, Ltd., A. C., WILLIAMS, B. C. FLEMING-, and ALLEN, A. May 4, 1944, No. 8434. [Class 40 (v)] In a circuit for generating linear potential sweeps and abrupt potential steps in which the anode is connected to a differentiating network feeding the grid, a resistance is inserted between the network and the grid, a voltage drop being maintained across the resistance to bias off the valve. A triggering pulse overcomes the bias, anode current commencing to flow to initiate a sweep of the anode potential. A differentiating network comprising con. denser C1 and resistor R3 is connected between the anode of valve V and the positive power supply, a resistance R2 connecting the grid. In the normal state the grid of valve V is held below cut off potential, the anode is held at the potential of the slider of potentiometer R1 and the lower plate of condenser C1 is held near earth potential due to the diodes D3, D1 and D2 conducting. Upon receipt of a positive triggering pulse over condenser C2, diode D4 conducts to charge condenser C3 cutting off diode D3 so that the grid potential of valve V rises and anode current commences to flow. The anode potential falls slightly and, due to coupling condenser C1, this drop is communicated to the anode of diode D2 which ceases to conduct, the current through resistor R3 then passing to the condenser C1. The grid potential rises slowly and the anode potential falls rapidly until the latter approaches earth potential and is no longer able to maintain the current through condenser C1. The grid potential rises abruptly, causing a large screen current and correspondingly large potential drop over resistor R7. This state continues until condenser C3 charges sufficiently over resistor R5 to cause diode D3 to conduct and cut off valve V, the anode potential then rising exponentially until arrested by diode D1 conducting. The screen potential falls slightly at the commencement of the cycle and remains in this state until the end of the anode sweep and then falls further and stays at this lower potential until condenser C3 charges sufficiently for the diode D3 to cut off valve V. The first step may be removed by feeding the voltage from the screen grid through a suitable limiter. To avoid drawing power from the triggering source the diode D4 may be replaced by a cathode follower Fig. 2 (not shown.
GB8434/44A 1944-05-04 1944-05-04 Improvements relating to thermionic generators for producing scanning and like voltages Expired GB577663A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB8434/44A GB577663A (en) 1944-05-04 1944-05-04 Improvements relating to thermionic generators for producing scanning and like voltages
US590694A US2494865A (en) 1944-05-04 1945-04-27 Triggered electronic sweep generator
DEC1882A DE832028C (en) 1944-05-04 1950-08-02 Circuit arrangement for generating a voltage with a saegezahnfoermigem and / or rectangular shape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8434/44A GB577663A (en) 1944-05-04 1944-05-04 Improvements relating to thermionic generators for producing scanning and like voltages

Publications (1)

Publication Number Publication Date
GB577663A true GB577663A (en) 1946-05-27

Family

ID=9852418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8434/44A Expired GB577663A (en) 1944-05-04 1944-05-04 Improvements relating to thermionic generators for producing scanning and like voltages

Country Status (3)

Country Link
US (1) US2494865A (en)
DE (1) DE832028C (en)
GB (1) GB577663A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE891093C (en) * 1950-11-03 1953-09-24 Philips Patentverwaltung Circuit arrangement for breakover voltage generators

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB644634A (en) * 1947-02-18 1950-10-18 Emi Ltd Improvements in or relating to integrating circuit arrangements
US2872592A (en) * 1950-08-03 1959-02-03 Ibm Electronic amplifier
US2872570A (en) * 1950-08-03 1959-02-03 Ibm Electronic amplifier
US2683806A (en) * 1952-03-31 1954-07-13 Ca Nat Research Council Discriminator circuit
GB771592A (en) * 1952-10-09 1957-04-03 Nat Res Dev Improvements relating to waveform shaping stages
US2955200A (en) * 1953-09-16 1960-10-04 Rca Corp Multivibrator with reset timing circuit
DE972364C (en) * 1954-05-23 1959-07-09 Fernseh Gmbh Circuit for picture and line return blanking
US2904680A (en) * 1954-06-14 1959-09-15 Du Mont Allen B Lab Inc Retriggered direct coupled sweep circuit
US2923890A (en) * 1958-01-29 1960-02-02 Bendix Aviat Corp Saw-tooth wave generator
US3028558A (en) * 1959-12-02 1962-04-03 Ibm Pulse producing circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266668A (en) * 1938-04-06 1941-12-16 Nat Television Corp Undamped wave generator
US2367116A (en) * 1942-01-31 1945-01-09 Rca Corp Wave control circuit
BE481371A (en) * 1942-02-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE891093C (en) * 1950-11-03 1953-09-24 Philips Patentverwaltung Circuit arrangement for breakover voltage generators

Also Published As

Publication number Publication date
DE832028C (en) 1952-02-21
US2494865A (en) 1950-01-17

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