公开(公告)号：US20190296755A1

公开(公告)日：2019-09-26

申请号：US15936015

申请日：2018-03-26

Applicant: QUALCOMM Incorporated

Inventor： Seyed Arash MIRHAJ ,  Masoud ENSAFDARAN ,  Lei SUN ,  Dinesh ALLADI

IPC: H03M1/08 ,  H03M1/00

Abstract: Certain aspects of the present disclosure provide methods and apparatus for performing background noise estimation using a circular histogram noise figure (CHNF) in an analog-to-digital converter (ADC) circuit with redundancy. The estimated noise may be used to reduce the noise (e.g., comparator noise) in the ADC circuit. One example ADC circuit generally includes at least one of a comparator or a digital-to-analog converter (DAC) and at least one digital feedback input. The at least one digital feedback input is coupled to the at least one of the comparator or the DAC and is configured to adjust at least one parameter of the at least one of the comparator or the DAC based on at least a portion of an output of the ADC circuit.