Patents by Inventor Adeel Ahmad
Adeel Ahmad has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190178987Abstract: An apparatus, including processing unit (PU) cores and computer readable storage devices storing machine instructions for determining a distance between a target object and a radar sensor circuit. The PU cores receive a beat signal generated by the radar sensor circuit and compensate for a phase difference between the received beat signal and a reconstruction of the received beat signal to obtain a phase compensated beat signal. The phase compensated beat signal is then filtered to remove spurious reflections by demodulating the phase compensated beat signal using an estimated frequency of the phase compensated beat signal. The PU cores then apply a low pass filter to the demodulated phase compensated beat signal, resulting in a modified beat signal. The PU cores then determine the distance between the target object and the radar sensor circuit using the modified beat signal.Type: ApplicationFiled: November 27, 2018Publication date: June 13, 2019Inventors: Muhammad Zubair IKRAM, Adeel AHMAD, Dan WANG, Murtaza ALI
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Patent number: 10302741Abstract: An FMCW radar is used to detect live objects by processing the matched, filtered radar return on a frame by frame basis. An FFT cross correlation coefficient is computed, followed by computing a modified geometric mean of the absolute value of the cross correlation coefficients. The modified geometric mean is then compared to a preset threshold to determine whether the object is moving or is stationary.Type: GrantFiled: April 4, 2016Date of Patent: May 28, 2019Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Adeel Ahmad, Dan Wang, Muhammad Zubair Ikram, Murtaza Ali
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Publication number: 20180279884Abstract: A mm-wave system includes transmission of a millimeter wave (mm-wave) signal by a plurality of transmitters to multiple objects, and receiving of return-mm-wave signals from the multiple objects by a plurality of receivers. A processor is configured to perform an algorithm to derive complex-valued samples and angle measurements from each receiver to identify one object from another object. The processor further extracts signal waveforms that correspond to each object and process the extracted signal waveforms to estimate breathing rate and heart rate of the identified object.Type: ApplicationFiled: September 27, 2017Publication date: October 4, 2018Applicant: Texas Instruments IncorporatedInventors: Adeel Ahmad, Dan Wang, June Chul Roh
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Publication number: 20180011170Abstract: In accordance with described examples, a method determines if a velocity of an object detected by a radar is greater than a maximum velocity by receiving on a plurality of receivers at least one frame of chirps transmitted by at least two transmitters and reflected off of the object. A velocity induced phase shift (?d) in a virtual array vector S of signals received by each receiver corresponding to a sequence of chirps (frame) transmitted by each transmitter is estimated. Phases of each element of virtual array vector S are corrected using ?d to generate a corrected virtual array vector Sc. A first Fourier transform is performed on the corrected virtual array vector Sc to generate a corrected virtual array spectrum to detect a signature that indicates that the object has an absolute velocity greater than a maximum velocity.Type: ApplicationFiled: December 7, 2016Publication date: January 11, 2018Inventors: Sandeep Rao, Karthik Subburaj, Dan Wang, Adeel Ahmad
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Publication number: 20160291142Abstract: An FMCW radar is used to detect live objects by processing the matched, filtered radar return on a frame by frame basis. An FFT cross correlation coefficient is computed, followed by computing a modified geometric mean of the absolute value of the cross correlation coefficients. The modified geometric mean is then compared to a preset threshold to determine whether the object is moving or is stationary.Type: ApplicationFiled: April 4, 2016Publication date: October 6, 2016Inventors: Adeel Ahmad, Dan Wang, Muhammad Zubair Ikram, Murtaza Ali
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Patent number: 9000826Abstract: An amplifier has a first pull-up path coupled between a voltage supply node and an output node, and a pull-down path coupled between the output node and a ground supply node. A second pull-up path is coupled between the voltage supply node and the output node. The second pull-up path is actuated by a feedback signal and biased by a biasing signal. An inverter circuit is operable to invert the signal at the amplifier output node to generate the feedback signal. A biasing circuit is configured to generate the biasing signal. The biasing circuit is configured to control a relative strength of the pull-down path to the second pull-up path, wherein the pull-down path is stronger than the second pull-up path in a manner that is consistently present over all PVT corners.Type: GrantFiled: May 19, 2014Date of Patent: April 7, 2015Assignee: STMicroelectronics International N.V.Inventors: Adeel Ahmad, Chandrajit Debnath
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Publication number: 20150071239Abstract: Described herein is a radio access provider configured to communicate with wireless access devices over frequency bands. The radio access provider receives service priorities associated with active applications of the wireless communication devices. Based at least in part on the service priorities, the radio access provider selects blocks or channels from one or more of the frequency bands for a radio communication link for each of at least a subset of the wireless communication devices. The selecting may include selecting block or channels from multiple ones of the frequency bands for the radio communication link for at least one of the subset of the wireless communication devices. The selecting may also be based at least in part on signal quality metrics for the frequency bands, cross-correlations of the frequency bands, or power capacities of the wireless communication devices.Type: ApplicationFiled: November 18, 2014Publication date: March 12, 2015Inventors: Hongliang Zhang, Mark McDiarmid, Adeel Ahmad
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Publication number: 20140253213Abstract: An amplifier has a first pull-up path coupled between a voltage supply node and an output node, and a pull-down path coupled between the output node and a ground supply node. A second pull-up path is coupled between the voltage supply node and the output node. The second pull-up path is actuated by a feedback signal and biased by a biasing signal. An inverter circuit is operable to invert the signal at the amplifier output node to generate the feedback signal. A biasing circuit is configured to generate the biasing signal. The biasing circuit is configured to control a relative strength of the pull-down path to the second pull-up path, wherein the pull-down path is stronger than the second pull-up path in a manner that is consistently present over all PVT corners.Type: ApplicationFiled: May 19, 2014Publication date: September 11, 2014Applicant: STMICROELECTRONICS INTERNATIONAL N.V.Inventors: Adeel Ahmad, Chandrajit Debnath
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Patent number: 8766697Abstract: An amplifier has a first pull-up path coupled between a voltage supply node and an output node, and a pull-down path coupled between the output node and a ground supply node. A second pull-up path is coupled between the voltage supply node and the output node. The second pull-up path is actuated by a feedback signal and biased by a biasing signal. An inverter circuit is operable to invert the signal at the amplifier output node to generate the feedback signal. A biasing circuit is configured to generate the biasing signal. The biasing circuit is configured to control a relative strength of the pull-down path to the second pull-up path, wherein the pull-down path is stronger than the second pull-up path in a manner that is consistently present over all PVT corners.Type: GrantFiled: August 1, 2012Date of Patent: July 1, 2014Assignee: STMicroelectronics International N.V.Inventors: Adeel Ahmad, Chandrajit Debnath
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Publication number: 20140035672Abstract: An amplifier has a first pull-up path coupled between a voltage supply node and an output node, and a pull-down path coupled between the output node and a ground supply node. A second pull-up path is coupled between the voltage supply node and the output node. The second pull-up path is actuated by a feedback signal and biased by a biasing signal. An inverter circuit is operable to invert the signal at the amplifier output node to generate the feedback signal. A biasing circuit is configured to generate the biasing signal. The biasing circuit is configured to control a relative strength of the pull-down path to the second pull-up path, wherein the pull-down path is stronger than the second pull-up path in a manner that is consistently present over all PVT corners.Type: ApplicationFiled: August 1, 2012Publication date: February 6, 2014Applicant: STMICROELECTRONICS INTERNATIONAL N.V.Inventors: Adeel Ahmad, Chandrajit Debnath
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Patent number: 8258818Abstract: Techniques for operating a switched-capacitor circuit to reduce input and feedback dependence and/or reduce reference modulation. A switched-capacitor circuit can be operated in four phases. In a first phase at a start of a cycle, the capacitor is charged/discharged by a common mode signal to mask any residual charge stored in the capacitor from a previous cycle. In a second phase, the capacitor is charged with an input signal. During a third phase, the capacitor is charged with a wide-bandwidth auxiliary reference signal, and during a fourth phase the capacitor is charged with a reference signal. During the third and fourth phases, the capacitor may be coupled to an integrating circuit to integrate a difference between the input signal and the reference signal.Type: GrantFiled: December 30, 2009Date of Patent: September 4, 2012Assignee: STMicroelectronics International N.V.Inventors: Chandrajit Debnath, Vigyan Jain, Adeel Ahmad
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Publication number: 20110001518Abstract: Techniques for operating a switched-capacitor circuit to reduce input and feedback dependence and/or reduce reference modulation. A switched-capacitor circuit can be operated in four phases. In a first phase at a start of a cycle, the capacitor is charged/discharged by a common mode signal to mask any residual charge stored in the capacitor from a previous cycle. In a second phase, the capacitor is charged with an input signal. During a third phase, the capacitor is charged with a wide-bandwidth auxiliary reference signal, and during a fourth phase the capacitor is charged with a reference signal. During the third and fourth phases, the capacitor may be coupled to an integrating to circuit to integrate a difference between the input signal and the reference signal.Type: ApplicationFiled: December 30, 2009Publication date: January 6, 2011Applicant: STMicroelectronics Pvt. Ltd.Inventors: Chandrajit Debnath, Vigyan Jain, Adeel Ahmad
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Patent number: 7394638Abstract: The embodiments of the present invention introduced and taught herein are directed to a whole-chip ESD protection arrangement that is independent of relative supply rail voltage and supply sequencing, thereby enabling ESD conduction path during ESD event and isolating the ESD conduction path during the power up and power down modes of the chip. An embodiment of the present invention uses the bi-directional R-C clamp with transistorized arrangements between powered rails and avoids the drawback of using uni-directional Clamps or diode array for clamping that consumes large silicon area, requires power sequencing and is prone to noise coupling between power rails.Type: GrantFiled: December 24, 2004Date of Patent: July 1, 2008Assignee: STMicroelectronics PVT. Ltd.Inventors: Adeel Ahmad, Rajat Chauhan
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Patent number: 7205786Abstract: A programmable output buffer providing variable drive strength and slew rate for a given noise limit that includes a driver stage that generates the output of the buffer and a plurality of selectively enabled switching elements, at least a predriver stage providing a plurality of selectable switching elements that enables the selected drive stage switching elements, and a selection means that enables the required predriver switching elements in the desired sequence to provide the desired drive strength and slew rate.Type: GrantFiled: April 26, 2004Date of Patent: April 17, 2007Assignee: STMicroelectronics Pvt. Ltd.Inventor: Adeel Ahmad
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Publication number: 20050162791Abstract: The embodiments of the present invention introduced and taught herein are directed to a whole-chip ESD protection arrangement that is independent of relative supply rail voltage and supply sequencing, thereby enabling ESD conduction path during ESD event and isolating the ESD conduction path during the power up and power down modes of the chip. An embodiment of the present invention uses the bi-directional R-C clamp with transistorized arrangements between powered rails and avoids the drawback of using uni-directional Clamps or diode array for clamping that consumes large silicon area, requires power sequencing and is prone to noise coupling between power rails.Type: ApplicationFiled: December 24, 2004Publication date: July 28, 2005Applicant: STMICROELECTRONICS PVT. LTD.Inventors: Adeel Ahmad, Rajat Chauhan
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Publication number: 20050001653Abstract: A programmable output buffer providing variable drive strength and slew rate for a given noise limit that includes a driver stage that generates the output of the buffer and a plurality of selectively enabled switching elements, at least a predriver stage providing a plurality of selectable switching elements that enables the selected drive stage switching elements, and a selection means that enables the required predriver switching elements in the desired sequence to provide the desired drive strength and slew rate.Type: ApplicationFiled: April 26, 2004Publication date: January 6, 2005Applicant: STMicroelectronics Pvt. Ltd.Inventor: Adeel Ahmad