公开(公告)号：US20230387929A1

公开(公告)日：2023-11-30

申请号：US17804779

申请日：2022-05-31

Applicant: QUALCOMM Incorporated

Inventor： Behnam SEDIGHI ,  Shi BU ,  Elias DAGHER ,  Dinesh Jagannath ALLADI

IPC: H03M1/08

CPC classification number: H03M1/0854

Abstract: Methods and apparatus for noise shaping in multi-stage analog-to-digital converters (ADCs). An example ADC generally includes a first conversion stage having a residue output; an amplifier having an input selectively coupled to the residue output of the first conversion stage; a second conversion stage having an input selectively coupled to an output of the amplifier; and a switched-capacitor network having a first port coupled to the input of the amplifier and having a second port coupled to the input of the second conversion stage, the switched-capacitor network being configured to provide a second-order or higher noise transfer function for noise shaping of quantization noise of the second conversion stage.