The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2008
Filed:
Jul. 23, 2004
Dennis J. Duven, Silver Spring, MD (US);
Joseph J. Suter, Ellicott City, MD (US);
Bruce G. Montgomery, Columbia, MD (US);
Dennis J. Duven, Silver Spring, MD (US);
Joseph J. Suter, Ellicott City, MD (US);
Bruce G. Montgomery, Columbia, MD (US);
The Johns Hopkins University, Baltimore, MD (US);
Syntonics LLC, Columbia, MD (US);
Abstract
An ensemble clock comprises: an input for receiving a reference signal; multiple free-running oscillators each configured to generate a corresponding free-running frequency; an output oscillator configured to generate a controlled frequency having a frequency responsive to a control signal; a differencer unit configured to derive difference measurements indicative of time and frequency-based errors associated with each of (i) the controlled frequency, and (ii) the free-running frequency, relative to the reference signal; and a controller configured to generate the control signal responsive to the difference measurements.