GB659806A - Improvements in or relating to electric pulse modulators - Google Patents

Improvements in or relating to electric pulse modulators

Info

Publication number
GB659806A
GB659806A GB12769/47A GB1276947A GB659806A GB 659806 A GB659806 A GB 659806A GB 12769/47 A GB12769/47 A GB 12769/47A GB 1276947 A GB1276947 A GB 1276947A GB 659806 A GB659806 A GB 659806A
Authority
GB
United Kingdom
Prior art keywords
pulses
discharge
tube
anode
voltage
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
GB12769/47A
Inventor
Alec Harley Reeves
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
Priority to BE482827D priority Critical patent/BE482827A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB12769/47A priority patent/GB659806A/en
Priority to US19088A priority patent/US2495768A/en
Priority to ES0183609A priority patent/ES183609A1/en
Priority to FR966161D priority patent/FR966161A/en
Publication of GB659806A publication Critical patent/GB659806A/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
    • H03K3/43—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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation

Landscapes

  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Plasma Technology (AREA)
  • Lasers (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

659,806. Pulse modulating. STANDARD TELEPHONES & CABLES, Ltd. May 12, 1947, No. 12769. [Class 40 (v)] [Also in Group XL (a)] A pulse time modulator comprises a coldcathode gas discharge tube (see Group XL (a)), with a maintaining potential insufficient to initiate a discharge, applied to the main discharge gap, means for periodically firing the gap at times depending on the signal voltage and means for periodically extinguishing the discharge. In one embodiment, durationmodulated pulses are produced in transformer 6, Fig. 1, connected in series with the main anode 2 and cathode 3 of tube 1. The maintaining potential is applied to anode 2 from source 7 and negative extinguishing pulses (a), Fig. 2, through condenser 15. The firing waveform (b) is applied to an auxiliary anode 4, through circuit 16, 17, and is modified by the signal voltage applied to transformer 12 connected between the anode 4 and a tapping on voltage source 7. If the signal wave (c) is added to waveform (b) the resultant (d) causes the tube to fire at times q, r, s, corresponding to the voltage v3 and the negative going pulses of waveforms (a) and (d) extinguish the tube at the times B, D, F, giving rise to duration modulated current pulses (e) through the transformer 6. Circuit 9, 10 provides negative feed-back of the signal voltage to the signal input circuit for distortion correction. In a modification, Fig. 3 (not shown), a similar circuit produces frequency modulated pulses, the control voltage waves being omitted and both discharge paths being self-squegging, due to the provision of squeg resistances. Specification 659,805 is referred to.
GB12769/47A 1947-05-12 1947-05-12 Improvements in or relating to electric pulse modulators Expired GB659806A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE482827D BE482827A (en) 1947-05-12
GB12769/47A GB659806A (en) 1947-05-12 1947-05-12 Improvements in or relating to electric pulse modulators
US19088A US2495768A (en) 1947-05-12 1948-04-05 Electric pulse modulator
ES0183609A ES183609A1 (en) 1947-05-12 1948-05-08 IMPROVEMENTS RELATED TO ELECTRIC PULSE MODULATIONS AND REPEATERS
FR966161D FR966161A (en) 1947-05-12 1948-05-11 Electrical signal converter assemblies using gas atmosphere and cold cathode electronic discharge tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12769/47A GB659806A (en) 1947-05-12 1947-05-12 Improvements in or relating to electric pulse modulators

Publications (1)

Publication Number Publication Date
GB659806A true GB659806A (en) 1951-10-31

Family

ID=10010795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12769/47A Expired GB659806A (en) 1947-05-12 1947-05-12 Improvements in or relating to electric pulse modulators

Country Status (4)

Country Link
US (1) US2495768A (en)
BE (1) BE482827A (en)
ES (1) ES183609A1 (en)
GB (1) GB659806A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791725A (en) * 1951-04-28 1957-05-07 Northrop Aircraft Inc Diode pulse amplifier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875151A (en) * 1928-02-07 1932-08-30 Westinghouse Lamp Co Glow relay tube
US1898486A (en) * 1931-11-02 1933-02-21 Wired Radio Inc Modulation system
BE475385A (en) * 1944-07-17

Also Published As

Publication number Publication date
ES183609A1 (en) 1948-07-01
US2495768A (en) 1950-01-31
BE482827A (en)

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