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:
Nov. 27, 2012
Filed:
Oct. 05, 2010
Sebastian Loeda, Edinburgh, GB;
Gary Hague, Faringdon, GB;
Sebastian Loeda, Edinburgh, GB;
Gary Hague, Faringdon, GB;
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Abstract
A summing-tracking quantizer additively combines multiple feed-forward outputs of cascaded integrator stages of a sigma-delta analog-to-digital converter with a scaled sampled analog signal, and a delayed scaled analog input signal. The summing tracking quantizer compensates for loop delay within a sigma-delta analog-to-digital converter. A loop delay compensation digital-to-analog converter for a sigma-delta analog-to-digital converter is merged with the voltage reference generator within the summing-tracking quantizer. The summing tracking quantizer selects reference voltages from the voltage reference generator based on a previous digital output code. The summing-tracking quantizer has a matrix switch that receives the previous digital output code and selects the reference voltage for applying to comparators for determining a differential quantization code that is additively combined to the previous digital output code to determine the present digital output code.