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. 08, 2022
Filed:
Oct. 08, 2020
Nxp B.v., San Jose, CA (US);
NXP B.V., Eindhoven, NL;
Abstract
A N-bit continuous-time sigma-delta modulator, SDM, () includes an input configured to receive an input analog signal (); a first summing junction () configured to subtract a feedback analog signal () from the input analog signal (); a loop filter () configured to filter an output signal from the first summing junction (): an N-bit analog-to-digital converter, ADC, comprising at least one 1-bit ADC configured to convert the filtered analog output signal () to a digital output signal () where each 1-bit ADC comprises at least one pair of comparator latches (); and a feedback path () for routing the digital output signal to the first summing junction (). The feedback path () includes a plurality of digital-to-analog converters, DACs, configured to convert the digital output signal () to an analog form. The ADC comprises or is operably coupled to, a calibration circuit () coupled to an input and an output of the at least one pair of comparator latches () and configured to apply respective calibration signals to individual comparator latches of the at least one pair of comparator latches () in a time-Interleaved manner, and calibrate a comparator error of the comparator latches in response to a latched output of the respective calibration signals.