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:
Feb. 23, 2010
Filed:
Dec. 15, 2004
Michel Robbe, Conflans Sainte Honorine, FR;
Sami Aissa, Paris, FR;
Michel Robbe, Conflans Sainte Honorine, FR;
Sami Aissa, Paris, FR;
Eads Secure Networks, Montigny le Bretonneaux, FR;
Abstract
An oscillator () supplies a high frequency signal (S) to a frequency divider (). A phase comparator () produces a signal measuring phase difference between the divided frequency signal (QA) and a reference signal. A low-pass filter () controls the oscillator on the basis of the measurement signal. A measurement window, of duration defined by counting cycles of the high frequency signal, is generated in response to each active edge of the divided frequency signal. The measurement signal is activated during the measurement window so that it comprises, when an active edge of the reference signal falls within the window, a first pulse between the start of the window and this edge and a second pulse, opposite to the first, between this edge and the end of the window.