autodyneadj.n.
/ˈɔːtə(ʊ)dʌɪn/, U.S. /ˈɔdəˌdaɪn/, /ˈɔdoʊˌdaɪn/, /ˈɑdəˌdaɪn/, /ˈɑdoʊˌdaɪn/ Radio.
A. adj.
Designating or relating to a circuit in which the part used for detection (detection n. 3) is also used as the local oscillator; (also) designating radio reception which makes use of such a circuit.
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society > communication > telecommunication > radio communications > [adjective] > method of receiving or detecting signal
heterodyne1908
autodyne1918
autoheterodyne1919
superheterodyne1920
neutrodyning1924
superhet1926
homodyne1928
frequency shift1944
1918 Circular U.S. Bureau of Standards No. 74. ii. 214 The electron tube may serve as a convenient source of local oscillations and at the same time as an amplifier and detector of the received signals. This is called the autodyne method.
1921 J. H. Morecroft Princ. Radio Communication vi. 483 In case the locally generated, high-frequency current is produced by the detecting tube itself, it is called autodyne reception.
1978 C. D. Ferris Introd. Bioinstrumentation v. 80 The capacitor forms part of the tuned circuit of either a Colpitts oscillator or autodyne detector.
2004 T. H. Lee Design CMOS Radio-frequency Integrated Circuits (ed. 2) xx. 769 In the autodyne circuit, the local oscillator is an echo of Armstrong's original regenerative circuit.
B. n.
An autodyne circuit. Now rare.
ΘΚΠ
society > communication > telecommunication > radio communications > radio equipment > [noun] > radio set > circuits
autoheterodyne1916
autodyne1919
oscillator circuit1920
preselector1927
1919 Princ. Underlying Radio Communication (U.S. Army Signal Corps) v. 300 An ‘autodyne’ or vacuum tube device arranged so that the detecting tube also produces the heterodyne action.
1930 U.S. Patent 1,748,277 2/2 These autodynes replace the heterodyne of Figure 1.
2003 I. V. Komarov & S. M. Smolskiy Fund. Short-range FM Radar ii. 16 The block diagram of this FM radar is given in Fig. 2.5. The main difference..is the use of an autodyne.
This entry has been updated (OED Third Edition, June 2011; most recently modified version published online December 2021).
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adj.n.1918