GB664768A - Improvements relating to thermionic valve oscillators - Google Patents

Improvements relating to thermionic valve oscillators

Info

Publication number
GB664768A
GB664768A GB636649A GB636649A GB664768A GB 664768 A GB664768 A GB 664768A GB 636649 A GB636649 A GB 636649A GB 636649 A GB636649 A GB 636649A GB 664768 A GB664768 A GB 664768A
Authority
GB
United Kingdom
Prior art keywords
pulse
conducting
valves
reciprocally
output
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
GB636649A
Inventor
Frederick William Cutts
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB636649A priority Critical patent/GB664768A/en
Publication of GB664768A publication Critical patent/GB664768A/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
    • 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

Abstract

664,768. Pulse generating circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Jan. 13, 1950 [March 9, 1949], No. 6366/49. Class 40 (vi). In a pulse generator as described in Specification 540,941, which comprises a reciprocally coupled pair of valves, one of which has a frequency determining circuit in its output, the steepness of the wavefronts of the generated pulse is increased by a resistor connected in series with the frequency determining circuit which causes the associated valve to undergo alternate rapid transitions from a conducting to a non-conducting state. The Figure shows a pulse generator comprising reciprocally-coupled valves 1, 2 in which the pulse repetition frequency is determined by the tuned circuit 3 and in which the resistor 10 ensures rapid changes between the conducting and non-conducting states in valve 1 so that the output pulse has steep leading and trailing edges.
GB636649A 1949-03-09 1949-03-09 Improvements relating to thermionic valve oscillators Expired GB664768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB636649A GB664768A (en) 1949-03-09 1949-03-09 Improvements relating to thermionic valve oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB636649A GB664768A (en) 1949-03-09 1949-03-09 Improvements relating to thermionic valve oscillators

Publications (1)

Publication Number Publication Date
GB664768A true GB664768A (en) 1952-01-09

Family

ID=9813192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB636649A Expired GB664768A (en) 1949-03-09 1949-03-09 Improvements relating to thermionic valve oscillators

Country Status (1)

Country Link
GB (1) GB664768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873369A (en) * 1955-05-12 1959-02-10 Motorola Inc Television synchronization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873369A (en) * 1955-05-12 1959-02-10 Motorola Inc Television synchronization

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