公开(公告)号：US20150341025A1

公开(公告)日：2015-11-26

申请号：US14487654

申请日：2014-09-16

Applicant: QUALCOMM Incorporated

Inventor： Derui KONG ,  Sang Min LEE ,  Michael Joseph McGOWAN ,  Dongwon SEO

IPC: H03K17/16

CPC classification number: H03K17/16 ,  H03F1/14 ,  H03F3/45188

Abstract: A method and apparatus are provided. The apparatus may be a capacitive element for adjusting a net capacitance of a circuit. The apparatus may be configured to be coupled to the circuit. The apparatus may be configured to adjust the net capacitance of the circuit to decouple common mode and differential loop bandwidth adjustment of the circuit. The capacitive element may include a pair of cross-coupled capacitors configured to be coupled to differential nodes of the circuit, and a pair of negative gain buffers coupled to respective capacitors.

Abstract translation: 提供了一种方法和装置。 该装置可以是用于调整电路的净电容的电容元件。 该装置可以被配置为耦合到该电路。 该装置可以被配置为调整电路的净电容以去耦合电路的共模和差分环路带宽调整。 电容元件可以包括配置为耦合到电路的差分节点的一对交叉耦合电容器，以及耦合到相应电容器的一对负增益缓冲器。

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。