Oscillators – Automatic frequency stabilization using a phase or frequency... – Plural a.f.s. for a single oscillator
Patent
1988-09-06
1989-08-15
Mis, David
Oscillators
Automatic frequency stabilization using a phase or frequency...
Plural a.f.s. for a single oscillator
331 25, 364421, 367 45, H03L 706, G01V 100
Patent
active
048578673
ABSTRACT:
The output of a local oscillator is applied to an external signal to produce a feedback error signal. The feedback error signal is utilized in adjusting the phase, frequency and amplitudes parameters of the local reference sine-cosine quadrature components which comprise the output of the local oscillator signal. Adjusting the parameters modifies the output of the local oscillator. The modified output of the local oscillator is applied to the external signal to continuously modify the feedback error signal, which in turn, continuously modifies the output of the local oscillator until the frequency and phase of the local oscillator signal is locked to that of the external signal.
REFERENCES:
patent: 3889108 (1975-06-01), Cantrell
patent: 4501004 (1985-02-01), Yoshida et al.
Widrow et al., Bernard, "Adaptive Noise Cancelling: Principles and Applications", Proceedings of the IEEE, vol. 63, No. 12, Dec. 1975.
Widrow, Bernard and Sterns, S. D., Adaptive Signal Processing, Prentice-Hall, Inc., 1985, pp. 99-116 and 316-337.
Glover, J. R., Adaptive Noise Cancelling of Sinusoidal Interference, Stanford University, University Microfilms International, 1986, pp. 30-34 and 64-72.
Hager Jr. George W.
McKillop Alexander J.
Mis David
Mobil Oil Corporation
Speciale Charles J.
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