GB318860A - Improvements in or relating to high frequency transmitters and receivers - Google Patents

Improvements in or relating to high frequency transmitters and receivers

Info

Publication number
GB318860A
GB318860A GB25119/29A GB2511929A GB318860A GB 318860 A GB318860 A GB 318860A GB 25119/29 A GB25119/29 A GB 25119/29A GB 2511929 A GB2511929 A GB 2511929A GB 318860 A GB318860 A GB 318860A
Authority
GB
United Kingdom
Prior art keywords
frequency
receivers
relating
high frequency
frequency transmitters
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
GB25119/29A
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 GB318860A publication Critical patent/GB318860A/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

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

318,860. Telefunken Ges. f³r Drahtlose Telegraphie. Sept. 10, 1928, [Convention date]. Thermionic generators and heterodyne receivers. -A high - frequency transmitter or receiver particularly adapted for short waves comprises a crystal-controlled oscillation generator QO modulated at M by an auxiliary generator AO of comparatively low frequency. One of the resulting side frequencies is selected by a filter F and is used either for transmission or as the local oscillation in heterodyne reception. Adjustment of the resulting frequency is effected by varying the frequency of the auxiliary generator AO. Valve circuits (Fig. 2, not shown) are described for carrying out the invention.
GB25119/29A 1928-09-10 1929-08-16 Improvements in or relating to high frequency transmitters and receivers Expired GB318860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE318860X 1928-09-10

Publications (1)

Publication Number Publication Date
GB318860A true GB318860A (en) 1930-07-17

Family

ID=6151224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25119/29A Expired GB318860A (en) 1928-09-10 1929-08-16 Improvements in or relating to high frequency transmitters and receivers

Country Status (1)

Country Link
GB (1) GB318860A (en)

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