公开(公告)号：US20200169279A1

公开(公告)日：2020-05-28

申请号：US16692006

申请日：2019-11-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Chandrasekhar SRIRAM ,  Jawaharlal TANGUDU ,  Eeshan MIGLANI ,  Jagannathan VENKATARAMAN

IPC: H04B1/30 ,  H04B1/10

Abstract: A non-linearity correction module, an optional droop corrector, and a zero-IF receiver with the non-linearity correction module and an optional droop corrector, wherein the non-linearity correction module is configured to generate a non-linearity term scaled to mitigate an inter-modulation component term of a RF signal received by the zero-IF receiver based on a test signal to enhance linearity in the zero-IF receiver and the optional droop corrector is configured to compensate a droop within a signal band of interest, caused by an analog low pass filter filtering a RF signal received by the zero-IF receiver, before a down-converted RF signal is fed into the non-linearity module.

公开(公告)号：US20220190856A1

公开(公告)日：2022-06-16

申请号：US17689627

申请日：2022-03-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Jagannathan VENKATARAMAN ,  Jawaharlal TANGUDU ,  Narasimhan RAJAGOPAL ,  Eeshan MIGLANI

IPC: H04B1/10 ,  H04B1/40 ,  H03G3/30 ,  H04B1/12

Abstract: Techniques maintaining receiver reliability, including determining a present attenuation level for an attenuator, wherein the attenuation level is set by a gain controller, determining a relative reliability threshold based on the present attenuation level, receiving a radio frequency (RF) signal, determining a voltage level of the received RF signal, comparing the voltage level of the received RF signal to the relative reliability threshold to determine that a reliability condition exists, and overriding, in response to the determination that the reliability condition exists, the present attenuation level set by the gain controller with an override attenuation level based on the present attenuation level.

公开(公告)号：US20210175914A1

公开(公告)日：2021-06-10

申请号：US17112137

申请日：2020-12-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Jagannathan VENKATARAMAN ,  Jawaharlal TANGUDU ,  Narasimhan RAJAGOPAL ,  Eeshan MIGLANI

IPC: H04B1/10 ,  H04B1/40 ,  H04B1/12 ,  H03G3/30

Abstract: Techniques maintaining receiver reliability, including determining a present attenuation level for an attenuator, wherein the attenuation level is set by a gain controller, determining a relative reliability threshold based on the present attenuation level, receiving a radio frequency (RF) signal, determining a voltage level of the received RF signal, comparing the voltage level of the received RF signal to the relative reliability threshold to determine that a reliability condition exists, and overriding, in response to the determination that the reliability condition exists, the present attenuation level set by the gain controller with an override attenuation level based on the present attenuation level.

公开(公告)号：US20200177417A1

公开(公告)日：2020-06-04

申请号：US16695586

申请日：2019-11-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jawaharlal TANGUDU ,  Sashidharan VENKATRAMAN ,  Sundarrajan RANGACHARI ,  Sarma Sundareswara GUNTURI ,  Sthanunathan RAMAKRISHNAN

IPC: H04L25/03 ,  H04L25/02 ,  H04B1/00

Abstract: An electrical system includes a transceiver with an IQ estimator and an IQ mismatch corrector. The electrical system also includes an antenna coupled to the transceiver. The IQ estimator is configured to perform frequency-domain IQ mismatch analysis to determine an IQ mismatch estimate at available frequency bins of a baseband data signal. The IQ mismatch corrector is configured to correct the baseband data signal based on the IQ mismatch estimate.

公开(公告)号：US20200169342A1

公开(公告)日：2020-05-28

申请号：US16593401

申请日：2019-10-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sashidharan VENKATRAMAN ,  Jawaharlal TANGUDU ,  Sarma Sundareswara GUNTURI ,  Yeswanth GUNTUPALLI

IPC: H04B17/364

Abstract: A phase spectrum based delay estimating method of tracking channel responses, extracting phase responses from the tracked channel responses, and generating a delay estimate, wherein the delay estimate is based on a slope and intercept estimates of the extracted phase responses with high quality metric to improve delay estimation, and a system thereof.

公开(公告)号：US20200153516A1

公开(公告)日：2020-05-14

申请号：US16661628

申请日：2019-10-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Chandrasekhar SRIRAM ,  Jawaharlal TANGUDU ,  Sashidharan VENKATRAMAN

IPC: H04B17/11 ,  H04B17/10 ,  H04L27/34

Abstract: A channel response generating module and method for generating a channel response based on a ratio of a channel response corresponding to an image signal frequency bin in relation to a channel response corresponding to a traffic signal frequency bin, or a channel response corresponding to a first frequency bin in relation to a channel response corresponding to a second frequency bin, and a zero-IF signal transmitter employing the channel response generating module and method to efficiently suppress image signals or compensate traffic signals during transmission of IQ RF signals.

公开(公告)号：US20190207612A1

公开(公告)日：2019-07-04

申请号：US15949294

申请日：2018-04-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Sundarrajan RANGACHARI ,  Aswath VS ,  Raunak DHANIWALA

IPC: H03L7/24 ,  H03L7/02 ,  H03K21/38

CPC classification number: H03L7/24 ,  H03K21/38 ,  H03L7/02

Abstract: A digital local oscillator includes a look-up table and oscillator control circuitry. The look-up table contains samples of the digital local oscillator signal. The oscillator control circuitry is configured to select samples from the look-up table based on an accumulated phase value. The oscillator control circuitry is also configured to add a correction value to the accumulated phase value based on a difference of a frequency of the digital local oscillator signal and a desired frequency.

公开(公告)号：US20190175037A1

公开(公告)日：2019-06-13

申请号：US15835646

申请日：2017-12-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Jaiganesh BALAKRISHNAN

IPC: A61B5/024

Abstract: An apparatus to detect a heart rate of a user includes a motion detection circuit configured to generate a motion status signal indicative of a motion status of the user. The apparatus also comprises a filter circuit coupled to the motion detection circuit that is configured to generate a filter circuit output signal based on dynamically variable. The coefficients are dependent on the motion status signal and a first signal received by the filter circuit. The apparatus also comprises a combination circuit coupled to the filter circuit and configured to receive a second signal indicative of the ambient light, the motion of the user, and non-ambient light reflected from the user. The combination circuit is configured to determine a difference between the second signal and the filter circuit output signal to generate a combination circuit output signal.

公开(公告)号：US20170078970A1

公开(公告)日：2017-03-16

申请号：US14852234

申请日：2015-09-11

Applicant: Texas Instruments Incorporated

Inventor： Jaiganesh BALAKRISHNAN ,  Sarma Sundareswara GUNTURI

IPC: H04W52/02 ,  H04L27/227 ,  H04W24/08 ,  H04B1/16

CPC classification number: H04W52/0232 ,  H04B1/16 ,  H04L27/2656 ,  H04L27/2663 ,  H04W52/0229 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/144

Abstract: The disclosure provides a low power receiver. The receiver includes a first channel that receives an RF signal and generates an input signal. The receiver also includes a second channel and a packet detection circuit. The packet detection circuit is coupled to the first channel and the second channel. The packet detection circuit detects a valid packet in the input signal, and activates the second channel on detection of the valid packet.

Abstract translation: 本公开提供了一种低功率接收机。 接收机包括接收RF信号并产生输入信号的第一信道。 接收机还包括第二信道和分组检测电路。 分组检测电路耦合到第一信道和第二信道。 分组检测电路检测输入信号中的有效分组，并且在检测到有效分组时激活第二信道。