GB630219A - Improvements relating to thermionic valve oscillators - Google Patents

Improvements relating to thermionic valve oscillators

Info

Publication number
GB630219A
GB630219A GB485347A GB485347A GB630219A GB 630219 A GB630219 A GB 630219A GB 485347 A GB485347 A GB 485347A GB 485347 A GB485347 A GB 485347A GB 630219 A GB630219 A GB 630219A
Authority
GB
United Kingdom
Prior art keywords
capacitor
bias potential
discharge
valve
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
GB485347A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB485347A priority Critical patent/GB630219A/en
Publication of GB630219A publication Critical patent/GB630219A/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
    • H03K4/16—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 single tube with positive feedback through transformer, e.g. blocking oscillator

Abstract

630,219. Saw-tooth generating circuits. SCOLES, C. J., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Feb. 19, 1947, No. 4853. [Class 40 (vi)] In a relaxation oscillator in which a capacitor is charged during each cycle to hold the associated valve cut-off for a peiod determined by its rate of discharge the discharge circuit comprises a main and auxiliary path, the latter including a rectifier in series with a resistor and an adjustable bias potential. During the charging period the capacitor is charged to a higher potential than that of the bias potential so that on cessation of the charging current it then discharges rapidly down to the bias potential through the short time-constant path including the rectifier and the adjustable bias potential and then more slowly through the main path which is of long time-constant, the recurrence frequency of the oscillator thus being variable over a wide range by adjustment of the bias potential. The Figure shows a blocking oscillator in which capacitor C is initially charged through the valve V so that its upper plate is left negatively charged and the valve blocks. The capacitor then discharges rapidly through the short time-constant circuit comprising diode D resistors R1 and R2 until the potential of the upper plate of the capacitor has fallen so that diode D no longer conducts, when the discharge is completed through resistor R3. The level at which the diode ceases to conduct and therefore the duration of the fast discharge may be adjusted by-mean.s of the tapping on potentiometer R2. The hard-valve V may be replaced by a thyratron.
GB485347A 1947-02-19 1947-02-19 Improvements relating to thermionic valve oscillators Expired GB630219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB485347A GB630219A (en) 1947-02-19 1947-02-19 Improvements relating to thermionic valve oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB485347A GB630219A (en) 1947-02-19 1947-02-19 Improvements relating to thermionic valve oscillators

Publications (1)

Publication Number Publication Date
GB630219A true GB630219A (en) 1949-10-07

Family

ID=9785037

Family Applications (1)

Application Number Title Priority Date Filing Date
GB485347A Expired GB630219A (en) 1947-02-19 1947-02-19 Improvements relating to thermionic valve oscillators

Country Status (1)

Country Link
GB (1) GB630219A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735010A (en) * 1956-02-14 bedford
US2922037A (en) * 1955-11-17 1960-01-19 Bell Telephone Labor Inc Quick recovery circuit for blocking oscillators
DE1085913B (en) * 1957-04-25 1960-07-28 Philips Nv Generator in the manner of a blocking oscillator
US2977549A (en) * 1957-08-07 1961-03-28 Westinghouse Electric Corp Parabolic waveshape generator
DE1119331B (en) * 1959-02-12 1961-12-14 Telefunken Patent Circuit arrangement for controlling the frequency of an astable multivibrator
DE1290182B (en) * 1960-06-03 1969-03-06 Philips Nv Blocking oscillator circuit arrangement with a transistor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735010A (en) * 1956-02-14 bedford
US2922037A (en) * 1955-11-17 1960-01-19 Bell Telephone Labor Inc Quick recovery circuit for blocking oscillators
DE1085913B (en) * 1957-04-25 1960-07-28 Philips Nv Generator in the manner of a blocking oscillator
US2977549A (en) * 1957-08-07 1961-03-28 Westinghouse Electric Corp Parabolic waveshape generator
DE1119331B (en) * 1959-02-12 1961-12-14 Telefunken Patent Circuit arrangement for controlling the frequency of an astable multivibrator
DE1290182B (en) * 1960-06-03 1969-03-06 Philips Nv Blocking oscillator circuit arrangement with a transistor

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