公开(公告)号：US09722746B2

公开(公告)日：2017-08-01

申请号：US15165088

申请日：2016-05-26

Applicant: MediaTek Inc.

Inventor： Stacy Ho ,  Wei-Hsin Tseng

IPC: H04L5/00 ,  H04B1/12 ,  H03M1/46 ,  H03M1/06 ,  H03M3/00 ,  H04B1/00 ,  H04L27/26

CPC classification number: H04L5/0041 ,  H03M1/0617 ,  H03M1/466 ,  H03M3/406 ,  H03M3/41 ,  H03M3/426 ,  H03M3/47 ,  H04B1/0075 ,  H04B1/123 ,  H04L5/001 ,  H04L27/2647

Abstract: Methods and apparatus for providing bandpass analog to digital conversion (ADC) in RF receiver circuitry of a wireless-communication device. The bandpass ADC includes first noise-shaping successive approximation register (NS-SAR) circuitry arranged in a first path and second NS-SAR circuitry arranged in a second path parallel to the first path, wherein the first and second NS-SAR circuitries are configured to alternately sample an analog input voltage at a particular sampling rate and to output a digital voltage at the particular sampling rate.

公开(公告)号：US20170085349A1

公开(公告)日：2017-03-23

申请号：US15165088

申请日：2016-05-26

Applicant: MediaTek Inc.

Inventor： Stacy Ho ,  Wei-Hsin Tseng

IPC: H04L5/00 ,  H03M3/00 ,  H03M1/06 ,  H04B1/12 ,  H03M1/46

CPC classification number: H04L5/0041 ,  H03M1/0617 ,  H03M1/466 ,  H03M3/406 ,  H03M3/41 ,  H03M3/426 ,  H03M3/47 ,  H04B1/0075 ,  H04B1/123 ,  H04L5/001 ,  H04L27/2647

Abstract: Methods and apparatus for providing bandpass analog to digital conversion (ADC) in RF receiver circuitry of a wireless-communication device. The bandpass ADC includes first noise-shaping successive approximation register (NS-SAR) circuitry arranged in a first path and second NS-SAR circuitry arranged in a second path parallel to the first path, wherein the first and second NS-SAR circuitries are configured to alternately sample an analog input voltage at a particular sampling rate and to output a digital voltage at the particular sampling rate.

公开(公告)号：US10483947B2

公开(公告)日：2019-11-19

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 ,  H03F3/45

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.