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:
Mar. 17, 2009
Filed:
May. 30, 2007
Jorge Deligiannis, Ottawa, CA;
Jorge Deligiannis, Ottawa, CA;
Energate Inc., Ottawa, CA;
Abstract
A method for increasing the resolution of analog to digital conversion made by a microcontroller. A resistive-capacitive network is connected between an input/output port of the microcontroller and a sense voltage to be converted. The sense voltage is measured (i.e. converted) using the port in input mode to obtain a nominal voltage. The port is then switched to output mode and driven high (or alternatively low) for a period of time to modify the sense voltage by an amount equal to a desired fractional resolution step size. The port is switched back to input mode and the modified voltage is measured. The steps of driving the port in output mode and measuring the modified voltage can be repeated with the modification to the sense voltage increasing in successively larger multiples of the desired fractional resolution step size. In one embodiment of the method, the successive measurements can be summed to give the converted original sense voltage expressed in fractional resolution step size.