Oscillators – Automatic frequency stabilization using a phase or frequency... – Molecular resonance stabilization
Patent
1981-05-19
1984-05-15
Grimm, Siegfried H.
Oscillators
Automatic frequency stabilization using a phase or frequency...
Molecular resonance stabilization
331 941, H03L 726
Patent
active
044491050
ABSTRACT:
A passive maser wherein control of the cavity and control of the oscillator on the line of stimulated emission operate in a shared-time mode. A control circuit acts on the injected signal by way of a programmable synthesizer, the injected signal then assuming the successive values .omega..sub.L.sup.+, .omega..sub.H, .omega..sub.H and .omega..sub.C.sup.+, .omega..sub.H and .omega..sub.C.sup.-, .omega..sub.L.sup.-, .omega..sub.L.sup.+, etc. in stages. .omega..sub.H is centered at the line of stimulated emission; .omega..sub.L.sup.+ and .omega..sub.L.sup.- which are symmetrically shifted interrogate the sides of the emission line; and .omega..sub.C.sup.+ and .omega..sub.C.sup.- which are further symmetrically shifted interrogate the sides of the cavity resonance. The control circuit periodically inhibits the detection action used for controlling the oscillator, and the detection action used for controlling the cavity is carried out only during the inhibition period.
REFERENCES:
patent: 4290030 (1981-09-01), Wang
patent: 4316153 (1982-08-01), Busca et al.
patent: 4326174 (1982-04-01), Busca et al.
F. L. Walls, "Design and Results from a Prototype Passive Hydrogen Maser quency Standard," Proc. 8th Ann. Precise Time and Time Interval (PTTI) Planning Meeting, 369, 1976.
F. L. Walls and D. A. Howe, "A Passive Hydrogen Maser Frequency Standard," Proc. 32nd Ann. Symp. on Freq. Control, 492, 1978.
F. L. Walls and H. Hellwig, "A New Kind of Passively Operating Hydrogen Frequency Standard," Proc. 30th Ann. Symp. on Freq. Control, 473, 1976.
F. L. Walls, U.S. Patent Application Ser. No. 851,326 (Filed Nov. 14, 1977), Available to Public as N.T.I.S. Report PB-277689.
Frank Alick H.
White Joseph D.
Beers Robert F.
Ellis William T.
Grimm Siegfried H.
Klein Alan P.
The United States of America as represented by the Secretary of
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