Texas Instruments Corporation

Other

Qualcomm Incorporated

Steradian Semiconductors Private Limited

Gireesh Rajendran

Apu Sivadas

Alok Prakash Joshi

Ashish Lachhwani

Rakesh Kumar

Subhashish Mukherjee

Yogesh Darwhekar

Krishnaswamy Thiagarajan

Debapriya Sahu

Gangadhar Burra

Ayush Mittal

Rittu Kulwant Sachdev

Abhishek Agrawal

Soumya Das

Bongyong Song

Visvesvaraya Appala Pentakota

Brian Paul Ginsburg

Gurkanwal Singh Sahota

Bhushan Shanti Asuri

Anil Kv Kumar

Jeremy H Lin

Vinod Panikkath

Nir Tal

Anand Kannan

Rahul Karmaker

Ankit Sharma

Anup Savla

Assaf Sella

MeeLan Lee

Srinivasan Venkatraman

Vijaya Bhaskar Rentala

Sai Gunaranjan Pelluri

Vivek Dham

David Cohen

Rittu Sachdev Singh

Amrith Sukumaran

According to an aspect, a radar system comprising a transmitter operative to transmit a first set of chirps on a single transmit antenna and a second set of chirps on a plurality of transmit antennas, in that, the first set of chirps forming a first part of a chirp frame and the second set of chirps forming a second part of the chirp frame, a first receiver segment operative to generate a first set of parameters from a first set of received chirps that is reflection of the first set of chirps from one or more objects and a second segment operative to generate a second set of parameters from a second set of received chirps that is reflection of the second set of chirps from the one or more objects part of the received chirp frame and the first set of parameters, wherein, first set of parameters and second set of parameters comprise at least one of range doppler and angle of one or more objects.

System, device and method for efficient MIMO radar

According to an aspect a low noise electronic voltage regulator comprises a regulating transistor operative to regulate an input DC voltage to provide a regulated DC output voltage, an error amplifier configured to generate an error signal based on a reference voltage and a feedback voltage, wherein the error amplifier receiving the feedback voltage through a feedback loop formed between the regulated DC output voltage and the feedback voltage, and a first amplifier in the feedback loop providing a gain of greater than unity from the regulated DC output voltage and the feedback voltage.

Low noise voltage regulator

According to an aspect, a tank circuit in an integrated circuit comprising a plurality of metal strips forming a first part of a closed contour enclosing a first area, a set of split sections forming a second part and geometrically aligned with the closed contour, and a plurality of capacitors coupled between the split sections to form the tank circuit, wherein a first flux linkage due a current flowing in the set of split sections pass through the first area in the same direction as that of a second flux linkage due to the current flowing in the plurality of metal strips, and the set of split sections and the plurality of metal strips together forming an inductance coil.

Method, system and device providing enhanced quality factor resonant LC tank in an integrated circuits

According to an aspect, a phase locked loop system comprises a charge pump (CP) comprising a set of switching transistors and a set of non-switching transistor, in that the set of switching transistors operative at a low break down voltage and a high switching speed compared to that of the set of non-switching transistors, and comparative a voltage comprising a configured to generate a UP pulse when a first plurality of metal strips forming a first part of a closed contour enclosing a first area, and a phase frequency detector (PFD) providing a UP pulse swinging between a VDDL and a VDDH, wherein the PFD is interfaced with the CP such that, the UP pulse drives a first switching transistor in the CP to couple the VDDH to an output terminal through a first non-switching transistor that is biased for charge pump.

PLL system and device with a low noise charge pump

A method in a time switched multiple input and multiple output (MIMO) radar system comprising, receiving () from an antenna array a plurality of data points representing a radar signal reflected from plurality of objects, forming () a first set of beams from the plurality of data points, wherein the first set of beams are making a first set angles with a normal to the antenna array, detecting a set of objects (A-L) from the first set of beams, determining () a set of Doppler frequencies of the set of objects, computing () a self-velocity representing a velocity of the antenna array from the set of Doppler frequencies and the first set of angles, and correcting () the plurality of data points using the self-velocity and a second set of angles to generate plurality of corrected data points.

Method, apparatus and device for doppler compensation in a time switched MIMO radar system

A multichannel radar system comprising a set of antennas each receiving a sequence of chirps reflected from plurality of objects, a range detector generating a set of range bins for each chirp, a beam former operative to generate a set of dominant frequency components from a group of range bins picked from the set of range bins across the set of antennas, a nearness detector for separating the set of dominant frequencies into a first set of dominant frequencies and a second set of dominant frequencies, a frequency subtractor configured to shift the each dominant frequency in the first set of dominant frequencies by its phase by a first value to form a third set of phase shifted dominant frequencies, and a Doppler estimator estimating a Doppler frequency of the each dominant frequency in the set of dominant frequencies from the third set of phase shifted dominant frequencies and the second set of dominant frequencies.

Method, apparatus and device for determining a velocity of an object in a time switched MIMO radar system

An object detection system comprises a first object detection unit detecting an object from a first radio frequency (RF) signal data comprising first set of characteristics representing a first object, a second object detection unit detecting the object from an optical image data and a calibration unit calibrating the first RF signal data from the optical image data, in that, the second object detection unit and the first object detection unit are aligned to detect the object in a first region.

Method and device for calibrating a radar object detection system

According to an aspect, a tri-level digital to analog converter (DAC) comprises a first set of switches turned on to cause a first analog value with a first error as an output for a first digital value, a second set of switches turned on to cause a second analog value with a second error as the output for a second digital value, wherein, both the first set of switches and the second set of switches are turned on to cause a third analog value, proportional to the first error and the second error, as the output for a digital value equal to zero, and both the first set of switches and the second set of switches are turned off to cause a fourth analog value equal to zero as the output for a fourth digital value representing a reset state.

Digital to analog converter tolerant to element mismatch

According to an aspect of the present invention, an electronic system () operative on a millimeter signal comprises an integrated circuit () comprising a first solder ball (A) and a second solder ball (B) respectively coupled to a positive and a negative signal interface points (and) of a differential millimeter signal on a die () housed in the integrated circuit (), wherein the first and the second solder balls (A andB) are positioned one behind other from an edge of the integrated circuit () and a three-path coplanar waveguide (CPW) comprising a center path (B) and a two adjacent paths (A andC) formed on a printed circuit board (PCB) () such that the center path (B) is coupled to the first solder ball that is in front and the two adjacent paths coupled to the second solder ball that is behind the first solder ball.

Millimeter wave integrated circuit and system with a low loss package transition

According to an aspect of present disclosure, a phase shifter for providing a desired phase shift to a very high frequency signal fabricated as part of the an integrated circuit comprises a first coil segment and a second coil segment together forming an inductor of first inductance value, a first capacitor of first capacitance value electrically connected parallel the inductor, a second capacitor of second capacitance value electrically connected between the first coil segment and the second coil segment and a resistor of a first resistance value electrically connected parallel to the second capacitor, in that, the inductor, first capacitor, second capacitor and the resistor together operative as a phase shifter such that when a input signal of a first frequency is presented across the first capacitor, the output signal across the resistor is phase shifted version of the input signal shifted in phase by a first angle.

Phase shifter for Giga Hertz integrated circuits

Disclosed is circuitry for operating a switch which sees high voltage swings across its source, gate, drain, and bulk terminals. The circuitry generates one or more bias voltages in proportion to an input voltage swing. The one or more bias voltages may be used to bias the gate and bulk terminals to provide reliable and improved turn OFF performance in the switch.

High voltage switch

A beam steering device comprising a set of phase shifters, each providing substantially same phase shift, connected such that output of one phase shifter feeds the input of other, in that a signal is cascaded through the set of phase shifters to generate a corresponding set of phase shifted signals, and an array of antennas forming the RF radiation beam. The set of phase shifted signals are coupled to the respective one of antenna in the array of antennas so as to steer the RF radiation beam in accordance with the phase shift. The device further comprises a set of mixer to translate the first set of phase shifted signals to a RF canter frequency.

Method, system and device for providing phase shifted signals to an array of antennas for beam steering

In an embodiment of the present disclosure, a Radar transceiver for object detection comprises a two dimensional antenna array receiving plurality of a reflected radio frequency (RF) signals, a mux-adder selectively adding the reflected RF signals in first mode and selectively multiplexing the reflected RF signals in a second mode, a range bin detector determining a valid range bins in the first mode and a three dimensional (3D) image reconstructor operating on the valid range bins to reconstruct a 3D image of the object in the second mode. In that the two dimensional antenna array comprises antenna elements arranged in K rows and M columns, and the mux-adder adds a RF signal received on the M columns of each row in the first mode. The mux-adder multiplexes the RF signal received on the M columns of each row in the second mode.

Method, system and device for radar based high resolution object detection

A notch filter including an inductor-capacitor tuning circuit is disclosed. The inductor-capacitor tuning circuit may determine a frequency response of the notch filter in accordance with an associated resonant frequency. In some exemplary embodiments, the inductor-capacitor circuit may include a differential inductor divided at a symmetry point and a variable capacitor coupled to the differential inductor at the symmetry point.

Notch filter with differential split inductor

Low noise switchable varactors and digital controlled oscillator (DCO) circuitry are presented for creating alternating signals at controlled frequencies, including a first transistor for selectively coupling two capacitors between varactor output nodes when a control signal is in a first state, second and third transistors for selectively coupling first and second internal nodes between the respective capacitors and the first transistor with a third internal node when the control signal is in the first state, and an inverter disconnected from the first and second internal nodes to mitigate phase noise and operable to control the voltage of the third internal node according to the control signal.

Growing community of inventors

Bengaluru, India

Gireesh Rajendran