公开(公告)号：US20170041014A1

公开(公告)日：2017-02-09

申请号：US15048027

申请日：2016-02-19

Applicant: Texas Instruments Incorporated

Inventor： Neeraj SHRIVASTAVA ,  Supreet JOSHI ,  Himanshu VARSHNEY ,  Jafar Sadique KAVILADATH ,  Visvesvaraya PENTAKOTA ,  Shagun DUSAD

IPC: H03M1/10 ,  H03M1/74 ,  H03M1/78

CPC classification number: H03M1/1009 ,  H03M1/1019 ,  H03M1/1057 ,  H03M1/66 ,  H03M1/742 ,  H03M1/745 ,  H03M1/785

Abstract: The disclosure provides a current steering digital to analog converter (DAC) that includes a plurality of DAC elements. At least one DAC element of the plurality of DAC elements is coupled to a calibration circuit. The calibration circuit includes a fixed current source coupled to a primary node of the DAC element through a first estimation switch. A digital code generator is coupled to the primary node, and generates a first digital code corresponding to a primary voltage generated at the primary node. The digital code generator generates a second digital code. A correction DAC is coupled to the digital code generator and generates a bias voltage based on the second digital code. The bias voltage is provided to the DAC element such that a current flowing through each DAC element of the plurality of DAC elements is equal.

Abstract translation: 本公开提供了包括多个DAC元件的电流转向数模转换器（DAC）。 多个DAC元件中的至少一个DAC元件耦合到校准电路。 校准电路包括通过第一估计开关耦合到DAC元件的主节点的固定电流源。 数字码发生器耦合到主节点，并且产生对应于在主节点处产生的主电压的第一数字码。 数字代码生成器产生第二数字代码。 校正DAC耦合到数字代码发生器并且基于第二数字代码产生偏置电压。 偏置电压被提供给DAC元件，使得流过多个DAC元件中的每个DAC元件的电流相等。

公开(公告)号：US20190013816A1

公开(公告)日：2019-01-10

申请号：US15859437

申请日：2017-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Neeraj SHRIVASTAVA ,  Jafar Sadique KAVILADATH

IPC: H03M1/00

Abstract: In some examples, a system comprises an analog-to-digital converter (ADC) to receive an analog input signal and a reset signal, the ADC to convert the analog input signal into a digital signal. The system comprises a digital-to-analog converter (DAC), coupled to the ADC, to convert the digital signal into an internal analog signal. The system includes a first capacitor, coupled to the DAC, to receive the internal analog signal. The system comprises a first switch, coupled to the first capacitor, to provide the analog input signal to the first capacitor. The system comprises a second switch to couple the first capacitor to ground.

公开(公告)号：US20190207619A1

公开(公告)日：2019-07-04

申请号：US16211259

申请日：2018-12-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jafar Sadique KAVILADATH ,  Neeraj SHRIVASTAVA

IPC: H03M1/36 ,  H03K19/0175

CPC classification number: H03M1/361 ,  H03K19/017509 ,  H03M1/145

Abstract: A circuit, which is usable in a flash analog-to-digital converter, includes a first switch configured to provide a first reference voltage to a first reference node responsive to a first control signal and a second switch configured to provide the first reference voltage to a second reference node responsive to a second control signal. A third switch is coupled to the first switch and is configured to provide a second reference voltage to the first reference node responsive to a clock signal. Further, a fourth switch is coupled to the second switch and configured to provide the second reference voltage to the second reference node responsive to the clock signal.