公开(公告)号：US20200041629A1

公开(公告)日：2020-02-06

申请号：US16052042

申请日：2018-08-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Lei DING ,  Srinath Mathur RAMASWAMY

IPC: G01S7/527 ,  H03M1/12 ,  H03K5/24 ,  H03F3/04 ,  H03G3/30

Abstract: An ultrasonic sensing system includes: an amplifier including an input and an output; and an n-level comparator, coupled to the output of the amplifier, to compare an adjustable threshold voltage to an output signal from the output of the amplifier. N is greater than or equal to 1. The system also includes a noise power estimator, coupled to an output of the n-level comparator, to generate a noise power signal indicative of noise power of an input signal at the input of the amplifier. The system further includes a time-varying threshold circuit, coupled to the noise power estimator and the n-level comparator, to adjust the adjustable threshold voltage based on the noise power signal.

公开(公告)号：US20200209388A1

公开(公告)日：2020-07-02

申请号：US16232308

申请日：2018-12-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Lei DING ,  Srinath Mathur RAMASWAMY ,  Anand DABAK

IPC: G01S15/58 ,  G01S15/93 ,  G01S7/53

Abstract: An ultrasound detect circuit includes a decimator that decimates a transmit signal to be transmitted through an ultrasonic transducer. The transmit signal is decimated to generate first and second template signals. The decimator uses a different decimation ratio to generate the first template signal than the second template signal. The circuit also includes a first correlator to correlate a signal derived from the ultrasonic transducer with the first template signal, aa second correlator to correlate the signal derived from the ultrasonic transducer with the second template signal, and a Doppler shift determination circuit to determine a Doppler frequency shift based on an output from the first correlator and an output from the second correlator.

公开(公告)号：US20160061947A1

公开(公告)日：2016-03-03

申请号：US14836521

申请日：2015-08-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujeet Milind PATOLE ,  Anand DABAK ,  Lei DING

IPC: G01S13/58 ,  G01S13/34

CPC classification number: G01S13/584 ,  G01S7/352 ,  G01S13/343

Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a relative velocity of the target object as compared to a velocity of the FMCW radar system by removing an effect of a range to the target object from a two dimensional range Doppler processing signal.

Abstract translation: 包括耦合到模数转换器（ADC）的收发器和耦合到ADC的数字信号处理器（DSP）的频率调制连续波（FMCW）雷达系统。 收发器被配置为发送多个FMCW啁啾声，接收多个反射的FMCW啁啾声，并将反射的FMCW啁啾与至少一个FMCW啁啾声混合以产生多个拍子信号。 反射的FMCW啁啾是从目标对象反射后的FMCW啁啾声。 ADC被配置为将拍频信号转换成多个数字线性调频脉冲。 DSP被配置为通过从二维范围多普勒处理信号中移除对目标对象的范围的影响，而与FMCW雷达系统的速度相比，接收数字啁啾并量化目标对象的相对速度。

公开(公告)号：US20160054438A1

公开(公告)日：2016-02-25

申请号：US14833916

申请日：2015-08-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sujeet Milind PATOLE ,  Anand DABAK ,  Lei DING ,  Murtaza ALI

IPC: G01S13/36 ,  G01S7/41 ,  G01S7/35 ,  G01S13/34

Abstract: A frequency modulated continuous wave (FMCW) radar system that includes a transceiver coupled to an analog to digital converter (ADC), and a digital signal processor (DSP) coupled to the ADC. The transceiver is configured to transmit a plurality of FMCW chirps, receive a plurality of reflected FMCW chirps, and mix the plurality of reflected FMCW chirps with at least one of the FMCW chirps to generate a plurality of beat signals. The reflected FMCW chirps are the FMCW chirps after being reflected off of a target object. The ADC is configured to convert the beat signals into a plurality of digital chirps. The DSP is configured to receive the digital chirps and quantify a plurality of vibration parameters for the target object based on a comparison of phase information in a frequency domain between one of the plurality of FMCW chirps and one of the plurality of digital chirps.

Abstract translation: 包括耦合到模数转换器（ADC）的收发器和耦合到ADC的数字信号处理器（DSP）的频率调制连续波（FMCW）雷达系统。 收发器被配置为发送多个FMCW啁啾声，接收多个反射的FMCW啁啾声，并且将多个反射的FMCW啁啾与至少一个FMCW啁啾声混合以产生多个拍子信号。 反射的FMCW啁啾是从目标对象反射后的FMCW啁啾声。 ADC被配置为将拍频信号转换成多个数字线性调频脉冲。 DSP被配置为基于多个FMCW啁啾中的一个与多个数字啁啾中的一个之间的频域中的相位信息的比较来接收数字啁啾并量化用于目标对象的多个振动参数。