GB491603A - Improvements in oscillatory circuits comprising negative resistance - Google Patents

Improvements in oscillatory circuits comprising negative resistance

Info

Publication number
GB491603A
GB491603A GB731537A GB731537A GB491603A GB 491603 A GB491603 A GB 491603A GB 731537 A GB731537 A GB 731537A GB 731537 A GB731537 A GB 731537A GB 491603 A GB491603 A GB 491603A
Authority
GB
United Kingdom
Prior art keywords
negative
hot conductor
current
hot
positive
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
GB731537A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to GB731537A priority Critical patent/GB491603A/en
Publication of GB491603A publication Critical patent/GB491603A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

491,603. Generating high - frequency oscillations. GENERAL ELECTRIC CO., Ltd. (Siemens & Halske Akt.-Ges.) March 12, 1937, No. 7315. Drawings to Specification. [Class 40 (v)] A hot conductor having a high temperature coefficient is operated, for the purpose of producing electric oscillations, at a mean current such that its A.C. resistance tends to a negative real value at zero frequency. The hot conductor is connected in parallel with an inductance or with a condenser according as its temperature coefficient is positive or negative, Figs. 6, 7 (not shown), or two hot conductors having coefficients of opposite sign may be connected in parallel, Fig. 5 (not shown). The oscillator is tuned by adjusting the mean or D.C. component of the current by means of a potentiometer, Fig. 8 (not shown). Additional passive impedance elements or a current-limiting device, Figs. 9, 10 (not shown), may be added to the circuit. Uranium dioxide may be used as a negative hot conductor, and an ironhydrogen resistance as a positive hot conductor.
GB731537A 1937-03-12 1937-03-12 Improvements in oscillatory circuits comprising negative resistance Expired GB491603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB731537A GB491603A (en) 1937-03-12 1937-03-12 Improvements in oscillatory circuits comprising negative resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB731537A GB491603A (en) 1937-03-12 1937-03-12 Improvements in oscillatory circuits comprising negative resistance

Publications (1)

Publication Number Publication Date
GB491603A true GB491603A (en) 1938-09-06

Family

ID=9830774

Family Applications (1)

Application Number Title Priority Date Filing Date
GB731537A Expired GB491603A (en) 1937-03-12 1937-03-12 Improvements in oscillatory circuits comprising negative resistance

Country Status (1)

Country Link
GB (1) GB491603A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469569A (en) * 1945-03-02 1949-05-10 Bell Telephone Labor Inc Point contact negative resistance devices
US3062970A (en) * 1959-09-24 1962-11-06 Rca Corp Converter circuits employing negative resistance elements
DE1188676B (en) * 1959-08-05 1965-03-11 Ibm Arrangement for generating electrical oscillations of very high frequency with at least one Esaki diode

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469569A (en) * 1945-03-02 1949-05-10 Bell Telephone Labor Inc Point contact negative resistance devices
DE1188676B (en) * 1959-08-05 1965-03-11 Ibm Arrangement for generating electrical oscillations of very high frequency with at least one Esaki diode
US3062970A (en) * 1959-09-24 1962-11-06 Rca Corp Converter circuits employing negative resistance elements

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