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:
May. 02, 2006
Filed:
Nov. 28, 2001
David Canard, Caen, FR;
Vincent Fillatre, Thaon, FR;
David Canard, Caen, FR;
Vincent Fillatre, Thaon, FR;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The present invention relates to a device for comparison CMP, which is designed to emit a control signal Vcnt, which is representative of a difference which exists between the input signal frequencies Vdiv and Vref. The device according to the invention includes a phase/frequency comparator PD, which supplies a regulation signal Tun, which is subjected to pulse width modulation according to the difference observed. The device also includes a current source, which is designed to emit a charge current Ics, with a value which is controlled by the regulation signal Tun. The device further includes a capacitive element Cs, which is designed to generate the control signal Vcnt, under the effect of the charge current Ics. By means of a regulation signal Tun, which has a frequency which is virtually constant, the invention makes it possible to impose high-frequency variations on the control signal Vcnt.