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:
Dec. 16, 2004
Michael J. Gilbert, Westford, MA (US);
Michael J. Gilbert, Westford, MA (US);
Valeo Raytheon Systems, Inc., Hudson, NH (US);
Abstract
A digital to analog converter includes a digital processor having an input port adapted to receive an input signal and an output port coupled to an input port of an analog filter wherein the digital processor includes a digital feedback loop which compares a reference digital voltage with a digital voltage provided by a digital model of the analog filter. Using a completely digital feedback loop which compares an input digital voltage with the digital voltage from the digital model of the analog filter results in a single bit digital to analog converter having improved accuracy for a given clock rate and filter. The next digital state of the converter (i.e. '0' or '1') is selected based upon a comparison of the input (or reference) voltage with the digital voltage provided by the digital feedback loop. The digital converter output is then fed to the analog filter. If the analog filter matches the digital model, then the analog voltage will match the digital voltage, and therefore the reference voltage.