公开(公告)号：US20190288672A1

公开(公告)日：2019-09-19

申请号：US16157165

申请日：2018-10-11

Applicant: MEDIATEK Inc.

Inventor： Tien-Yu LO ,  Chan-Hsiang WENG ,  Patrick Cooney ,  Tsung-Kai KAO ,  Stacy HO

IPC: H03H17/04

Abstract: The invention provides an anti-aliasing filter (AAF) for discretization at a sampling period. The AAF may include an operational amplifier having an input terminal and an output terminal, a first capacitor coupled between the input terminal and the output terminal, a second capacitor, and a first switch coupled between the first capacitor and the second capacitor. During a first phase, the first switch may conduct the second capacitor to the first capacitor. During a second phase, the first switch may stop conducting the second capacitor to the first capacitor. The first phase may last for one said sampling period.

公开(公告)号：US20240413830A1

公开(公告)日：2024-12-12

申请号：US18739623

申请日：2024-06-11

Applicant: MEDIATEK INC.

Inventor： Tsung-Kai KAO ,  Chi-Lun LO

IPC: H03M1/06

Abstract: A successive-approximation register analog-to-digital converter (SAR ADC) with comparator error detection is shown, which introduces a comparator error detector to detect errors of the comparators used in the SAR ADC. Digital control bits controlling a digital-to-analog converter (DAC) of the SAR ADC include most significant bits (MSBs) and least significant bits (LSBs), and the DAC is configured to provide redundancy approximation at the lowest bit of the MSBs. The comparators include a plurality of MSB comparators corresponding to the MSBs. The comparator error detector detects the occurrence of a comparator error based on the LSBs, and identifies the target comparator that is causing the comparator error based on the MSBs.