公开(公告)号：US10534083B2

公开(公告)日：2020-01-14

申请号：US15458054

申请日：2017-03-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udayan Dasgupta ,  David P. Magee ,  Murtaza Ali

IPC: G01S15/89 ,  A61B8/06 ,  A61B8/08 ,  A61B8/00 ,  G01S7/52

Abstract: Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value.

公开(公告)号：US20170184720A1

公开(公告)日：2017-06-29

申请号：US15458054

申请日：2017-03-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udayan Dasgupta ,  David P. Magee ,  Murtaza Ali

IPC: G01S15/89 ,  A61B8/00 ,  A61B8/06 ,  A61B8/08

Abstract: Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (“RF”) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value.

公开(公告)号：US09184761B2

公开(公告)日：2015-11-10

申请号：US14194236

申请日：2014-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Abhijit A. Patki ,  Ganesan Thiagarajan ,  Udayan Dasgupta

IPC: H03M1/12 ,  H03M1/08 ,  H03M1/18 ,  H03M1/36

CPC classification number: H03M1/125 ,  H03M1/08 ,  H03M1/0836 ,  H03M1/0845 ,  H03M1/0854 ,  H03M1/089 ,  H03M1/124 ,  H03M1/1265 ,  H03M1/186 ,  H03M1/36

Abstract: A method, comprising: selecting three Two-Tuples before and three after a selected synchronous ADC conversion point; calculating the coefficients of a third order polynomial based on the value of the previous time asynchronous sample, the time difference between the asynchronous samples surrounding the selected sample, and the five linear slopes of the line segments between the three points before and the points after the selected synchronous sample point, including the slope of the selected point; evaluating the third order polynomial at the synchronous time instant; generating the synchronous ADC value based on this calculation; and using the ADC value as the desired voltage level of the synchronous sample, wherein the synchronous ADC value is generated based on this calculation.

Abstract translation: 一种方法，包括：在选择的同步ADC转换点之前和之后选择三个二元组; 基于先前时间异步样本的值计算三次多项式的系数，周围所选样本的异步样本之间的时间差和之前三点之间的线段的五个线性斜率 选择同步采样点，包括所选点的斜率; 在同步时刻评估三阶多项式; 基于此计算产生同步ADC值; 并且使用ADC值作为同步采样的期望电压电平，其中基于该计算生成同步ADC值。

公开(公告)号：US09077360B2

公开(公告)日：2015-07-07

申请号：US14194304

申请日：2014-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Udayan Dasgupta ,  Ganesan Thiagarajan ,  Venugopal Gopinathan

IPC: H03M1/00 ,  H03M1/08 ,  H03M1/12 ,  H03M1/18 ,  H03M1/36

CPC classification number: H03M1/125 ,  H03M1/08 ,  H03M1/0836 ,  H03M1/0845 ,  H03M1/0854 ,  H03M1/089 ,  H03M1/124 ,  H03M1/1265 ,  H03M1/186 ,  H03M1/36

Abstract: An apparatus, comprising: an analog to digital converter including: a clipping detector; and a post-processor, wherein the post processor generates synchronous values of clipped data based on non-clipped values of non-clipped data.

Abstract translation: 一种装置，包括：模数转换器，包括：限幅检测器; 以及后处理器，其中所述后处理器基于未剪切数据的未剪切值来生成剪切数据的同步值。

公开(公告)号：US20140247174A1

公开(公告)日：2014-09-04

申请号：US14194264

申请日：2014-02-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ganesan Thiagarajan ,  Udayan Dasgupta ,  Venugopal Gopinathan

IPC: H03M1/12

CPC classification number: H03M1/125 ,  H03M1/08 ,  H03M1/0836 ,  H03M1/0845 ,  H03M1/0854 ,  H03M1/089 ,  H03M1/124 ,  H03M1/1265 ,  H03M1/186 ,  H03M1/36

Abstract: A method, comprising: selecting two Two-Tuples before and two after a selected synchronous ADC conversion point; calculating the coefficients of a third order polynomial based on the value of the previous time asynchronous sample, the time differences between each of the asynchronous samples surrounding the selected sample, and the three linear slopes of the line segments between the two points before and the points after the selected synchronous sample point, including the slope of the selected point; evaluating the third order polynomial at the synchronous time instant; generating the synchronous ADC value based on this calculation; and using the ADC value as the desired voltage level of the synchronous sample, wherein the synchronous ADC value is generated based on this calculation.

Abstract translation: 一种方法，包括：在选择的同步ADC转换点之前和之后选择两个二元组; 基于先前时间异步样本的值计算三阶多项式的系数，围绕所选样本的每个异步样本之间的时间差和之前两点之间的线段的三个线性斜率与点之间 选定同步采样点后，包括所选点的斜率; 在同步时刻评估三阶多项式; 基于此计算产生同步ADC值; 并且使用ADC值作为同步采样的期望电压电平，其中基于该计算生成同步ADC值。