公开(公告)号：US20180017982A1

公开(公告)日：2018-01-18

申请号：US15269881

申请日：2016-09-19

Applicant: QUALCOMM Incorporated

Inventor： Tongyu SONG ,  Jeffrey Mark HINRICHS

IPC: G05F1/46 ,  H04W84/12 ,  H04W84/04

Abstract: A voltage regulator includes a band limited reference voltage. The band limited reference voltage is generated from a supply voltage combined with a feedback path to provide a band reject power supply rejection ratio (PSRR). The voltage regulator also includes a feedforward path to extend the band reject PSRR.

公开(公告)号：US20200028495A1

公开(公告)日：2020-01-23

申请号：US16516114

申请日：2019-07-18

Applicant: QUALCOMM Incorporated

Inventor： Tongyu SONG

IPC: H03K3/012 ,  H03K3/037 ,  H04L7/033 ,  H04W56/00 ,  H04W52/02

Abstract: A DC-coupled buffer is provided with two switch transistors controlled by a delayed version of an output signal for the DC-coupled buffer. A first one of the switch transistors functions to cut off a current discharged into ground that would otherwise flow while an input signal for the DC-coupled buffer is discharged. A remaining second one of the switch transistors functions to increase the operating speed of the DC-coupled buffer.

公开(公告)号：US20150318863A1

公开(公告)日：2015-11-05

申请号：US14609383

申请日：2015-01-29

Applicant: QUALCOMM Incorporated

Inventor： Tongyu SONG ,  Derui KONG

IPC: H03M1/10 ,  H03M1/68

CPC classification number: H03M1/1047 ,  H03M1/1057 ,  H03M1/68 ,  H03M1/742

Abstract: In an aspect of the disclosure, a method and an apparatus are provided for calibrating a DAC. The apparatus calibrates a first DAC element, provides a residual current error resulting from the calibration, the residual current error being a difference between a calibrated current source of the first DAC element and a reference current source, stores the residual current error of the calibrated first DAC element in a first memory module using at least first and second storage elements coupled to a differential amplifier, and calibrates a second DAC element using the stored residual current error.

Abstract translation: 在本公开的一方面，提供了一种用于校准DAC的方法和装置。 该装置校准第一DAC元件，提供由校准导致的剩余电流误差，剩余电流误差是第一DAC元件的校准电流源与参考电流源之间的差，存储校准的第一个 DAC元件，其使用至少第一和第二存储元件耦合到差分放大器，并且使用所存储的剩余电流误差来校准第二DAC元件。