Method and apparatus for accurately estimating a clock frequency and for simulating a precision clock oscillator
CA 2114408 A1 · Owner: Easley, Matthew F. · Inventors: Tjahjadi, Taruna; Rife, David C.; Easley, Matthew F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A PRECISION CLOCK OSCILLATOR" Abstract of the Disclosure, A method for estimating the frequency of the symbol clock in an incoming signal so as to match the frequency of the local symbol clock to the frequency of the remote symbol clock. An analog front end (15) samples an incoming signal to provide a sampled signal. A frequency estimator and clock recovery circuit (16) recovers the symbol clock in the incoming signal and performs a Discrete Time Fourier Transform (DTFT) at two frequencies F1, and F2. The amplitude of the DTFT at F1 is compared with the amplitude of the DTFT at F2 to provide an estimate of the frequency of the symbol clock in the incoming signal. A master clock (20) …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 2016.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.