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. 28, 2012
Filed:
Apr. 09, 2009
Philippe Mace, Rennes, FR;
Xavier Guitton, Chasne sur Illet, FR;
Philippe Benezeth, Cesson Sevigne, FR;
Philippe Mace, Rennes, FR;
Xavier Guitton, Chasne sur Illet, FR;
Philippe Benezeth, Cesson Sevigne, FR;
Thomson Licensing, Issy-les-Moulineaux, FR;
Abstract
A generation method of an analogue signal generated by a PWM signal whose cyclic ratio and period are parametrizable is discussed. It is thus possible choose the pair formed from the cyclic ratio and the period producing an analogue value that is the closest to the value corresponding to the programmed command value. But the differences between the analogue values can be very great and generate zones of imprecision of variable width. Outside of these zones, the generated analogue signal is very precise. Therefore, when the command value associated with a pair is imprecise, a digital shift is applied to the command value at the same time as the application of an analogue shift means. Both shifts have the same amplitude and of opposite directions such that the cancel each other out, producing a precise analogue value. A device for generating an analogue signal implementing the method is also discussed.