GB840810A - Improvements in electron discharge circuits - Google Patents

Improvements in electron discharge circuits

Info

Publication number
GB840810A
GB840810A GB229557A GB229557A GB840810A GB 840810 A GB840810 A GB 840810A GB 229557 A GB229557 A GB 229557A GB 229557 A GB229557 A GB 229557A GB 840810 A GB840810 A GB 840810A
Authority
GB
United Kingdom
Prior art keywords
output
negative
conduct
photo
grid
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
GB229557A
Inventor
Geoffrey Elms
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.)
ELCONTROL Ltd
Original Assignee
ELCONTROL 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 ELCONTROL Ltd filed Critical ELCONTROL Ltd
Priority to GB229557A priority Critical patent/GB840810A/en
Publication of GB840810A publication Critical patent/GB840810A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/02—Input circuits
    • 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
    • H03K3/42—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

840,810. Photo-electric control arrangements. ELCONTROL Ltd. May 12, 1955 [May 13, 1954], No. 2295/57. Divided out of 14011/54. Class 40(3). A light sensitive circuit for generating pulses in accordance with changes of illumination comprises a photo-cell 10 connected between the grid of hard valve VI and a point on resistor R maintained at a suitable negative potential. The output at the anode of VI is coupled to the grid of a second hard valve V2 by means of glow discharge tube 13 and the anode output of V2 which is the pulse output may be fed to a utilization circuit such as a dekatron counter S1. When the photo-cell is dark current flows in V1, the potential across 13 is insufficient to cause it to strike and V2 is cut-off due to the negative bias applied to its grid from line 14. Illuminating the cell causes it to conduct, cutting off V1, increasing the potential across tube 13 to cause it to strike and thus cause V2 to conduct. The result is a negative going front edge to an output pulse at the anode of V2, the rear edge of the pulse occurs when the illumination falls to a value at which tube 13 ceases to conduct. Differentiation results in negative and positive going short pulses at the front and rear edges of the output pulse (as shown) and if desired one or other of these short pulses may be suppressed, as for example by diode D.
GB229557A 1954-05-13 1954-05-13 Improvements in electron discharge circuits Expired GB840810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB229557A GB840810A (en) 1954-05-13 1954-05-13 Improvements in electron discharge circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB229557A GB840810A (en) 1954-05-13 1954-05-13 Improvements in electron discharge circuits

Publications (1)

Publication Number Publication Date
GB840810A true GB840810A (en) 1960-07-13

Family

ID=9737057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB229557A Expired GB840810A (en) 1954-05-13 1954-05-13 Improvements in electron discharge circuits

Country Status (1)

Country Link
GB (1) GB840810A (en)

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