Oscillators – Automatic frequency stabilization using a phase or frequency... – Afc with logic elements
Reexamination Certificate
2004-03-04
2008-08-12
Kinkead, Arnold (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Afc with logic elements
C331S018000, C331S034000, C331S17700V, C331S037000, C331S042000, C331S040000, C332S127000, C327S156000, C455S260000, C375S376000
Reexamination Certificate
active
07411461
ABSTRACT:
A control loop (10) for producing an output signal with a stable nominal frequency is provided. The control loop includes inputs for reference (11) and oscillator (25) output signals, a beat frequency generator (12) for producing a signal with a frequency that is the difference between the oscillator and reference signal frequencies, an ADC (14) to convert the beat frequency to a digital beat frequency signal, an estimator (17) for estimating the frequency or phase of the beat signal, an adder (18) for combining an offset and modulation signal and the estimated frequency or phase of the beat signal into an added signal, and a DAC (23) for generating an analogue control signal for controlling the oscillator output frequency.
REFERENCES:
patent: 4607393 (1986-08-01), Nolde et al.
patent: 4720687 (1988-01-01), Ostoich et al.
patent: 4801894 (1989-01-01), Garner
patent: 4856085 (1989-08-01), Horvat
patent: 5266907 (1993-11-01), Dacus
patent: 7079591 (2006-07-01), Fling et al.
patent: 2005/0186920 (2005-08-01), Staszewski et al.
patent: 0402113 (1995-09-01), None
patent: 2333916 (1999-08-01), None
patent: 11233149 (1999-08-01), None
patent: 9907065 (1999-02-01), None
S. Albrecht et al., “A Study Of Nonlinearities For A Frequency-Locked Loop Principle,” South Symposium on Mixed-Signal Design, pp. 71-75 (2003).
Dann Dorfman Herrell and Skillman, P.C.
Kinkead Arnold
Tait Electronics Limited
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