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. 04, 2014
Filed:
Dec. 08, 2010
Paulo Gustavo Raymundo Silva, Delft, NL;
Michael Hendrikus Laurentius Kouwenhoven, Morgan Hill, CA (US);
Paulo Gustavo Raymundo Silva, Delft, NL;
Michael Hendrikus Laurentius Kouwenhoven, Morgan Hill, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A sigma-delta (ΣΔ) difference-of-squares LOG-RMS to digital converter' by merging a traditional ΣΔ modulator with an analog LOG-RMS to DC converter based on a difference-of-squares concept. Two basic architectures include one based on two squaring cells in the feedforward and feedback paths and a second based on a single squaring cell in the forward path. High-order ΣΔ LOG-RMS can be implemented with a loop filter containing multiple integrators and feedforward and/or feedback paths for frequency compensation. The embodiments as described allow the implementations of ΣΔ difference-of-squares LOG-RMS to DC converters with a natural digital output and a logarithmically compressed dynamic range.