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:
Dec. 07, 2021
Filed:
Oct. 02, 2020
Qualcomm Incorporated, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Certain aspects of the present disclosure provide a successive approximation register (SAR) analog-to-digital converter (ADC) implemented with a digital filter for noise shaping. For example, certain aspects provide a circuit for analog-to-digital conversion having: a first digital-to-analog converter (DAC) having an output coupled to a sampling node; a comparator having an input coupled to the sampling node; SAR logic having an input coupled to an output of the comparator and at least one output coupled to an input of the first DAC; a quantizer configured to generate a first digital signal representing a voltage at the sampling node; a digital filter configured to apply a filter to the first digital signal; and a second DAC configured to generate an analog signal representing the filtered first digital signal and provide the analog signal to the sampling node.