GB314089A - Improvements in or relating to arrangements for tuning high frequency circuits - Google Patents

Improvements in or relating to arrangements for tuning high frequency circuits

Info

Publication number
GB314089A
GB314089A GB19129/29A GB1912929A GB314089A GB 314089 A GB314089 A GB 314089A GB 19129/29 A GB19129/29 A GB 19129/29A GB 1912929 A GB1912929 A GB 1912929A GB 314089 A GB314089 A GB 314089A
Authority
GB
United Kingdom
Prior art keywords
arrangements
relating
high frequency
frequency circuits
reception
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
GB19129/29A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB314089A publication Critical patent/GB314089A/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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
    • H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
    • H03B5/34—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being vacuum tube

Landscapes

  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

314,089. Telefunken Ges. f³r Drahtlose Telegraphie. June 23, 1928, [Convention date]. Thermionic valve circuits.- Frequency-control in transmissions, and selective tuning in reception, is effected by means of two or more piezo crystals K, K1, Fig. 1, each connected in the grid circuit in series with a variable capacity Ck or inductance. By inserting at will either one crystal alone, or both in parallel or in series, a greater range of frequency-variation becomes possible. In Fig. 2 a number of crystals K are arranged to give detective reception by means of a switch (not shown).
GB19129/29A 1928-06-23 1929-06-21 Improvements in or relating to arrangements for tuning high frequency circuits Expired GB314089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE314089X 1928-06-23

Publications (1)

Publication Number Publication Date
GB314089A true GB314089A (en) 1930-05-08

Family

ID=6144124

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19129/29A Expired GB314089A (en) 1928-06-23 1929-06-21 Improvements in or relating to arrangements for tuning high frequency circuits

Country Status (1)

Country Link
GB (1) GB314089A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441570A (en) * 1945-09-04 1948-05-18 Jack M Glessner Method of utilizing crystal oscillators to effect frequency selection
US2477547A (en) * 1945-01-03 1949-07-26 Bendix Aviat Corp Modulation of radio-frequency oscillations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477547A (en) * 1945-01-03 1949-07-26 Bendix Aviat Corp Modulation of radio-frequency oscillations
US2441570A (en) * 1945-09-04 1948-05-18 Jack M Glessner Method of utilizing crystal oscillators to effect frequency selection

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