公开(公告)号：US10050635B2

公开(公告)日：2018-08-14

申请号：US15273498

申请日：2016-09-22

Applicant: QUALCOMM Incorporated

Inventor： Burt Price ,  Ajay Janardanan ,  Yeshwant Kolla

IPC: H03M1/06 ,  H03M1/10 ,  H03F3/45

Abstract: A device includes an amplifier and calibration circuitry coupled to the amplifier. The calibration circuitry is configured to receive calibration values. The calibration circuitry is also configured to generate an output value in response to receiving a timing input.

公开(公告)号：US20170338830A1

公开(公告)日：2017-11-23

申请号：US15273498

申请日：2016-09-22

Applicant: QUALCOMM Incorporated

Inventor： Burt Price ,  Ajay Janardanan ,  Yeshwant Kolla

IPC: H03M1/06 ,  H03M1/10

CPC classification number: H03M1/0617 ,  H03F3/45977 ,  H03F2200/375 ,  H03F2203/45044 ,  H03F2203/45048 ,  H03M1/1009

Abstract: A device includes an amplifier and calibration circuitry coupled to the amplifier. The calibration circuitry is configured to receive calibration values. The calibration circuitry is also configured to generate an output value in response to receiving a timing input.

公开(公告)号：US20170047903A1

公开(公告)日：2017-02-16

申请号：US15085122

申请日：2016-03-30

Applicant: QUALCOMM Incorporated

Inventor： Burt Lee Price ,  Yeshwant Nagaraj Kolla ,  Dhaval Rajeshbhai Shah ,  Ajay Janardanan

IPC: H03F3/45

CPC classification number: H03F3/45071 ,  H03F3/45973 ,  H03F2200/153 ,  H03F2200/78 ,  H03F2203/45048

Abstract: Automatically calibrating operational amplifier (op-amp) systems for mitigating effects of offset voltages are disclosed. In one aspect, an automatically calibrating op-amp system is provided that employs an analog calibration signal corresponding to a calibration mode to compensate an output voltage signal of an op-amp corresponding to an amplify mode. An automatic calibration circuit is included that employs a successive approximation register (SAR) controller configured to successively generate digital values based on the output voltage signal of the op-amp in response to a mode signal indicating the calibration mode. The automatic calibration circuit includes a digital-to-analog converter (DAC) configured to convert each successive digital value into the analog calibration signal in response to the mode signal indicating the calibration mode. The analog calibration signal is provided to an auxiliary differential input of the op-amp to compensate for the composite offset voltage in the amplify mode.

Abstract translation: 公开了用于减轻失调电压影响的运算放大器（运算放大器）系统的自动校准。 一方面，提供一种自动校准运算放大器系统，其采用对应于校准模式的模拟校准信号来补偿与放大模式相对应的运算放大器的输出电压信号。 包括一种自动校准电路，其采用逐次逼近寄存器（SAR）控制器，其配置为响应于指示校准模式的模式信号，基于运算放大器的输出电压信号连续生成数字值。 自动校准电路包括被配置为响应于指示校准模式的模式信号将每个连续的数字值转换成模拟校准信号的数模转换器（DAC）。 将模拟校准信号提供给运算放大器的辅助差分输入，以补偿放大模式下的复合失调电压。

公开(公告)号：US09712126B2

公开(公告)日：2017-07-18

申请号：US15085122

申请日：2016-03-30

Applicant: QUALCOMM Incorporated

Inventor： Burt Lee Price ,  Yeshwant Nagaraj Kolla ,  Dhaval Rajeshbhai Shah ,  Ajay Janardanan

IPC: H03F3/45

CPC classification number: H03F3/45071 ,  H03F3/45973 ,  H03F2200/153 ,  H03F2200/78 ,  H03F2203/45048

Abstract: Automatically calibrating operational amplifier (op-amp) systems for mitigating effects of offset voltages are disclosed. In one aspect, an automatically calibrating op-amp system is provided that employs an analog calibration signal corresponding to a calibration mode to compensate an output voltage signal of an op-amp corresponding to an amplify mode. An automatic calibration circuit is included that employs a successive approximation register (SAR) controller configured to successively generate digital values based on the output voltage signal of the op-amp in response to a mode signal indicating the calibration mode. The automatic calibration circuit includes a digital-to-analog converter (DAC) configured to convert each successive digital value into the analog calibration signal in response to the mode signal indicating the calibration mode. The analog calibration signal is provided to an auxiliary differential input of the op-amp to compensate for the composite offset voltage in the amplify mode.