Patents by Inventor Chinmaya Mishra
Chinmaya Mishra 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: 20240106490Abstract: A transmit (TX) local oscillator (LO) leakage calibration circuit including a transceiver having a transmit portion and a receive portion, an interface circuit connected to the transmit portion and the receive portion, an impedance control circuit connected to a low noise amplifier (LNA) in the receive portion, the impedance control circuit configured to adjust an input impedance for the LNA, a power detector coupled to an output of the LNA, and a local oscillator cancellation element connected to the power detector, the local oscillator cancellation element configured to adjust an input to the transmit portion based on TX LO leakage detected by the power detector.Type: ApplicationFiled: September 22, 2022Publication date: March 28, 2024Inventors: Chinmaya MISHRA, Abdellatif BELLAOUAR, Damin CAO, Rajagopalan RANGARAJAN, Kevin Hsi-Huai WANG
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Patent number: 11916580Abstract: An integrated circuit operable to measure an impedance presented to a transmitter path of the integrated circuit and a method thereof are provided. The integrated circuit includes a directional coupler that has an input port, a through port, a coupled port, and an isolation port. The integrated circuit also includes a power amplifier coupled to the input port of the directional coupler, a power detector configured to measure output levels from the coupled port and the isolation port of the directional coupler, a reference signal generator coupled to the isolation port of the directional coupler, and a vector modulator configured to adjust a phase of a signal generated from the power amplifier.Type: GrantFiled: September 23, 2021Date of Patent: February 27, 2024Assignee: QUALCOMM IncorporatedInventors: Jeremy Goldblatt, Chinmaya Mishra
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Patent number: 11909368Abstract: A dual mode notch filter for use in a multi-band millimeter wave (mmW) transmitter includes a transmit filter circuit disposed between two amplifiers in a mmW transmit signal path, the transmit filter circuit formed by at least one switch, at least one capacitor, and a double-tuned transformer, the transmit filter circuit having at least two modes configured to selectively filter a spurious signal in at least a first communication band.Type: GrantFiled: September 7, 2021Date of Patent: February 20, 2024Assignee: QUALCOMM IncorporatedInventors: Kai Zhan, Chinmaya Mishra
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Patent number: 11736150Abstract: Aspects of the present relate to reflection type phase shifters for radio frequency (RF) wireless devices. Reflection type phase structures in accordance with aspects described herein can improve device performance with compact configurations, such as where magnetic and capacitive coupling is integrated into a device design to integrate interactions between elements for improved phase shifting performance in a compact design with wideband performance.Type: GrantFiled: September 25, 2021Date of Patent: August 22, 2023Assignee: QUALCOMM IncorporatedInventors: Chuan Wang, Maziar Hedayati, Bhushan Shanti Asuri, Muhammad Hassan, Chinmaya Mishra, Anosh Davierwalla
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Publication number: 20230258699Abstract: In certain aspects, a method is provided for measuring power using a resistive element coupled between a power amplifier and an antenna. The method includes squaring a voltage from a first terminal of the resistive element to obtain a first signal, squaring a voltage from a second terminal of the resistive element to obtain a second signal, and generating a measurement signal based on a difference between the first signal and the second signal. In some implementations, the resistive element is implemented with a power switch.Type: ApplicationFiled: April 25, 2023Publication date: August 17, 2023Inventors: Abdellatif BELLAOUAR, Arul BALASUBRAMANIYAN, Gurkanwal Singh SAHOTA, Muhammad HASSAN, Jorge GARCIA, Bhushan Shanti ASURI, Ravi SRIDHARA, Omar Essam EL-AASSAR, Chinmaya MISHRA
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Patent number: 11656254Abstract: In certain aspects, a method is provided for measuring power using a resistive element coupled between a power amplifier and an antenna. The method includes squaring a voltage from a first terminal of the resistive element to obtain a first signal, squaring a voltage from a second terminal of the resistive element to obtain a second signal, and generating a measurement signal based on a difference between the first signal and the second signal. In some implementations, the resistive element is implemented with a power switch.Type: GrantFiled: July 17, 2020Date of Patent: May 23, 2023Assignee: QUALCOMM IncorporatedInventors: Abdellatif Bellaouar, Arul Balasubramaniyan, Gurkanwal Singh Sahota, Muhammad Hassan, Jorge Garcia, Bhushan Shanti Asuri, Ravi Sridhara, Omar Essam El-Aassar, Chinmaya Mishra
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Patent number: 11637581Abstract: A system for power amplifier control includes a processor, a memory in communication with the processor, wherein the processor and the memory are configured to simultaneously provide input signal strength of each of a plurality of power amplifiers in a millimeter wave (mmW) phased array system, determine an average input signal strength of the plurality of power amplifiers based on the provided input signal strengths using an analog-to-digital converter (ADC), determine a voltage headroom for the plurality of power amplifiers based on the determined average input signal strength, estimate a power backoff value based on the voltage headroom, and determine a gain control value based on the estimated power backoff value.Type: GrantFiled: September 23, 2021Date of Patent: April 25, 2023Assignee: QUALCOMM IncorporatedInventors: Chinmaya Mishra, Nikhil Anand Muthya, Damin Cao, Shrenik Patel
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Publication number: 20230106620Abstract: An integrated circuit operable to measure an impedance presented to a transmitter path of the integrated circuit and a method thereof are provided. The integrated circuit includes a directional coupler that has an input port, a through port, a coupled port, and an isolation port. The integrated circuit also includes a power amplifier coupled to the input port of the directional coupler, a power detector configured to measure output levels from the coupled port and the isolation port of the directional coupler, a reference signal generator coupled to the isolation port of the directional coupler, and a vector modulator configured to adjust a phase of a signal generated from the power amplifier.Type: ApplicationFiled: September 23, 2021Publication date: April 6, 2023Inventors: Jeremy GOLDBLATT, Chinmaya MISHRA
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Publication number: 20230095788Abstract: Aspects of the present relate to reflection type phase shifters for radio frequency (RF) wireless devices. Reflection type phase structures in accordance with aspects described herein can improve device performance with compact configurations, such as where magnetic and capacitive coupling is integrated into a device design to integrate interactions between elements for improved phase shifting performance in a compact design with wideband performance.Type: ApplicationFiled: September 25, 2021Publication date: March 30, 2023Inventors: Chuan WANG, Maziar HEDAYATI, Bhushan Shanti ASURI, Muhammad HASSAN, Chinmaya MISHRA, Anosh DAVIERWALLA
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Publication number: 20230086058Abstract: A system for power amplifier control includes a processor, a memory in communication with the processor, wherein the processor and the memory are configured to simultaneously provide input signal strength of each of a plurality of power amplifiers in a millimeter wave (mmW) phased array system, determine an average input signal strength of the plurality of power amplifiers based on the provided input signal strengths using an analog-to-digital converter (ADC), determine a voltage headroom for the plurality of power amplifiers based on the determined average input signal strength, estimate a power backoff value based on the voltage headroom, and determine a gain control value based on the estimated power backoff value.Type: ApplicationFiled: September 23, 2021Publication date: March 23, 2023Inventors: Chinmaya MISHRA, Nikhil Anand MUTHYA, Damin CAO, Shrenik PATEL
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Patent number: 11609253Abstract: In certain aspects, an apparatus includes a power detector coupled between a power amplifier and an antenna, and a voltage detector coupled between the power amplifier and the antenna. The apparatus also includes a phase shifter coupled to the power detector, and a load measurement circuit coupled to the power detector, the voltage detector, and the phase shifter.Type: GrantFiled: September 30, 2020Date of Patent: March 21, 2023Assignee: QUALCOMM IncorporatedInventors: Bhushan Shanti Asuri, Chinmaya Mishra, Omar Essam El-Aassar
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Patent number: 11588458Abstract: An amplifier circuit for a millimeter wave (mmW) communication system includes an amplifier coupled to a matching network, and a variable gain control circuit in the matching network, the variable gain control circuit having an adjustable gain control resistance, the adjustable gain control resistance having adjustable segments and a center node therebetween, the center node coupled to an alternating current (AC) ground.Type: GrantFiled: December 18, 2020Date of Patent: February 21, 2023Assignee: QUALCOMM IncorporatedInventors: Marco Vigilante, Chinmaya Mishra
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Patent number: 11546004Abstract: Aspects of the disclosure relate to an apparatus for wireless communication. The apparatus may include a set of power detectors configured to generate a set of analog signals related to a set of output signal power levels of a set of transmit chains of a transmitter, respectively; an analog summer; a set of switching devices configured to send a selected one or more of the set of analog signals to the analog summer, and substantially isolated unselected one or more of the set of power detectors from the analog summer, wherein the analog summer is configured to generate a cumulative analog signal based on a sum of the selected one or more of the set of analog signals; an analog-to-digital converter (ADC) configured to generate a digital signal based on the cumulative analog signal; and a controller configured to control the set of switching devices.Type: GrantFiled: March 24, 2021Date of Patent: January 3, 2023Assignee: QUALCOMM IncorporatedInventors: Meysam Azin, Li Lu, Anees Habib, Chinmaya Mishra, Damin Cao, Arul Balasubramaniyan, David Ta-hsiang Lin, Shuang Zhu, Dinesh Jagannath Alladi
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Publication number: 20220416737Abstract: A peak detector for a power amplifier is provided that includes a threshold voltage detector configured to pulse a detection current in response to an amplified output signal from the amplifier exceeding a peak threshold. A plurality of such peak detectors may be integrated with a corresponding plurality of power amplifiers in a transmitter. Should any peak detector assert an alarm signal or more than a threshold number of alarm signals during a given period, a controller reduces a gain for the plurality of power amplifiers.Type: ApplicationFiled: June 23, 2021Publication date: December 29, 2022Inventors: Jeremy GOLDBLATT, Arul BALASUBRAMANIYAN, Chinmaya MISHRA, Damin CAO, Bhushan Shanti ASURI
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Patent number: 11495890Abstract: An apparatus is disclosed for controlling a power amplifier that is coupled to an antenna element of an antenna array. In example implementations, an apparatus includes an antenna element of an antenna array and a power amplification system. The power amplification system includes at least one input node, at least one output node coupled to the antenna element, and at least one power amplifier branch coupled between the at least one input node and the at least one output node. The power amplification system also includes at least one feedback node coupled to the at least one output node, at least one control node, and a feedback control loop coupled between the at least one feedback node and the at least one control node.Type: GrantFiled: May 8, 2020Date of Patent: November 8, 2022Assignee: QUALCOMM IncorporatedInventors: Chinmaya Mishra, Bhushan Shanti Asuri
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Publication number: 20220311460Abstract: Aspects of the disclosure relate to an apparatus for wireless communication. The apparatus may include a set of power detectors configured to generate a set of analog signals related to a set of output signal power levels of a set of transmit chains of a transmitter, respectively; an analog summer; a set of switching devices configured to send a selected one or more of the set of analog signals to the analog summer, and substantially isolated unselected one or more of the set of power detectors from the analog summer, wherein the analog summer is configured to generate a cumulative analog signal based on a sum of the selected one or more of the set of analog signals; an analog-to-digital converter (ADC) configured to generate a digital signal based on the cumulative analog signal; and a controller configured to control the set of switching devices.Type: ApplicationFiled: March 24, 2021Publication date: September 29, 2022Inventors: Meysam AZIN, Li LU, Anees HABIB, Chinmaya MISHRA, Damin CAO, Arul BALASUBRAMANIYAN, David Ta-hsiang LIN, Shuang ZHU, Dinesh Jagannath ALLADI
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Patent number: 11398853Abstract: A transformer-based antenna switching network includes a transformer having a secondary winding that extends between a first terminal and a second terminal. The first terminal couples to ground through a first switch and connects to a first antenna. The second terminal couples to ground through a second switch and connects to a second antenna.Type: GrantFiled: October 8, 2019Date of Patent: July 26, 2022Assignee: QUALCOMM IncorporatedInventors: Chinmaya Mishra, Marco Vigilante, Chirag Dipak Patel, Bhushan Shanti Asuri, Rajagopalan Rangarajan
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Patent number: 11393619Abstract: A transformer has a first inductor that includes a first port. The transformer also has a second inductor magnetically coupled to the first inductor. The second inductor includes a second port. The second inductor includes a first portion configured to permit current flow in a clockwise direction and a second portion configured to permit current flow in a counter-clockwise direction. The transformer also has a third inductor magnetically coupled to the first inductor. The third inductor includes a third port. The counter-clockwise direction is opposite the clockwise direction to reduce magnetic coupling between the second inductor and the third inductor based on magnetic coupling cancellation.Type: GrantFiled: October 26, 2018Date of Patent: July 19, 2022Assignee: QUALCOMM IncorporatedInventors: Haitao Cheng, Sherif Mahmoud Shakib Roshdy, Abbas Abbaspour-Tamijani, Chinmaya Mishra
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Publication number: 20220200576Abstract: A dual mode notch filter for use in a multi-band millimeter wave (mmW) transmitter includes a transmit filter circuit disposed between two amplifiers in a mmW transmit signal path, the transmit filter circuit formed by at least one switch, at least one capacitor, and a double-tuned transformer, the transmit filter circuit having at least two modes configured to selectively filter a spurious signal in at least a first communication band.Type: ApplicationFiled: September 7, 2021Publication date: June 23, 2022Inventors: Kai ZHAN, Chinmaya MISHRA
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Publication number: 20220200557Abstract: An amplifier circuit for a millimeter wave (mmW) communication system includes an amplifier coupled to a matching network, and a variable gain control circuit in the matching network, the variable gain control circuit having an adjustable gain control resistance, the adjustable gain control resistance having adjustable segments and a center node therebetween, the center node coupled to an alternating current (AC) ground.Type: ApplicationFiled: December 18, 2020Publication date: June 23, 2022Inventors: Marco VIGILANTE, Chinmaya MISHRA