Patents by Inventor Tirdad Sowlati
Tirdad Sowlati 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: 20230216654Abstract: Disclosed herein are related to systems and methods for correcting non-linearity due to duty cycle error. In one aspect, a system includes a mixer configured to up-convert transmission (Tx) data, a coefficient calibrator configured to select a target value of a coefficient based on a measurement of an interference signal due to non-linearity of the mixer, and an interference canceller coupled to the coefficient calibrator and the mixer. In some embodiments, the interference canceller is configured to generate compensated Tx data based on the Tx data and the selected target value of the coefficient and provide the compensated Tx data to the mixer. In some embodiments, the compensated Tx data corrects for the non-linearity of the mixer.Type: ApplicationFiled: March 15, 2023Publication date: July 6, 2023Applicant: Avago Technologies International Sales Pte. LimitedInventors: Bevin George Perumana, Mohyee Mikhemar, Tirdad Sowlati, Alvin Lin, Sudharshan Srinivasan, Wei-Hong Chen
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Patent number: 11637686Abstract: Disclosed herein are related to systems and methods for correcting non-linearity due to duty cycle error. In one aspect, a system includes a mixer configured to up-convert transmission (Tx) data, a coefficient calibrator configured to select a target value of a coefficient based on a measurement of an interference signal due to non-linearity of the mixer, and an interference canceller coupled to the coefficient calibrator and the mixer. In some embodiments, the interference canceller is configured to generate compensated Tx data based on the Tx data and the selected target value of the coefficient and provide the compensated Tx data to the mixer. In some embodiments, the compensated Tx data corrects for the non-linearity of the mixer.Type: GrantFiled: March 19, 2021Date of Patent: April 25, 2023Assignee: Avago Technologies International Sales Pte. LimitedInventors: Bevin George Perumana, Mohyee Mikhemar, Tirdad Sowlati, Alvin Lin, Sudharshan Srinivasan, Wei-Hong Chen
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Patent number: 11601942Abstract: A device implementing unified coordination of wireless communications over multiple physical layers may include a MAC module communicatively coupled to first and second physical layer modules that are each configured to communicate with another device over first and second physical wireless channels, respectively. The MAC module may be configured to provide data to the first physical layer module for transmission to the another device over the first physical wireless channel, where the first physical wireless channel is associated with a first link parameter. The MAC module may be further configured to facilitate initializing the second physical wireless channel based at least in part on the first link parameter of the first physical wireless channel, and after initialization of the second physical wireless channel, provide second data to the second physical layer module for transmission to the another device over the second physical wireless channel.Type: GrantFiled: January 22, 2021Date of Patent: March 7, 2023Assignee: Avago Technologies International Sales Pte. LimitedInventors: Vinko Erceg, Mark Gonikberg, Rohit Gaikwad, Hongyu Xie, Anand Iyer, Venkat Kodavati, Tirdad Sowlati, Payam Torab Jahromi, Matthew J. Fischer
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Publication number: 20220247435Abstract: Disclosed herein are related to systems and methods for selectively disabling current steering circuitries. In one aspect, the system includes a balun including a first inductor and a second inductor, a first current steering circuit coupled to the first inductor, a second current steering circuit coupled to the first inductor, and a controller coupled to the first current steering circuit and the second current steering circuit. In one aspect, the controller is configured to, based on input data having a first state, apply a first signal and a second signal having a first level to the first current steering circuit and a third signal and a fourth signal having the first level to the second current steering circuit to disable a first current through the second inductor, a second current through the first current steering circuit, and a third current through the second current steering circuit.Type: ApplicationFiled: March 19, 2021Publication date: August 4, 2022Inventors: Bevin George Perumana, Mohyee Mikhemar, Tirdad Sowlati, Alvin Lin, Sudharshan Srinivasan, Wei-Hong Chen
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Publication number: 20220247433Abstract: Disclosed herein are related to systems and methods for correcting non-linearity due to duty cycle error. In one aspect, a system includes a mixer configured to up-convert transmission (Tx) data, a coefficient calibrator configured to select a target value of a coefficient based on a measurement of an interference signal due to non-linearity of the mixer, and an interference canceller coupled to the coefficient calibrator and the mixer. In some embodiments, the interference canceller is configured to generate compensated Tx data based on the Tx data and the selected target value of the coefficient and provide the compensated Tx data to the mixer. In some embodiments, the compensated Tx data corrects for the non-linearity of the mixer.Type: ApplicationFiled: March 19, 2021Publication date: August 4, 2022Inventors: Bevin George Perumana, Mohyee Mikhemar, Tirdad Sowlati, Alvin Lin, Sudharshan Srinivasan, Wei-Hong Chen
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Patent number: 11398844Abstract: Disclosed herein are related to systems and methods for selectively disabling current steering circuitries. In one aspect, the system includes a balun including a first inductor and a second inductor, a first current steering circuit coupled to the first inductor, a second current steering circuit coupled to the first inductor, and a controller coupled to the first current steering circuit and the second current steering circuit. In one aspect, the controller is configured to, based on input data having a first state, apply a first signal and a second signal having a first level to the first current steering circuit and a third signal and a fourth signal having the first level to the second current steering circuit to disable a first current through the second inductor, a second current through the first current steering circuit, and a third current through the second current steering circuit.Type: GrantFiled: March 19, 2021Date of Patent: July 26, 2022Assignee: Avago Technologies International Sales Pte. LimitedInventors: Bevin George Perumana, Mohyee Mikhemar, Tirdad Sowlati, Alvin Lin, Sudharshan Srinivasan, Wei-Hong Chen
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Publication number: 20210144711Abstract: A device implementing unified coordination of wireless communications over multiple physical layers may include a MAC module communicatively coupled to first and second physical layer modules that are each configured to communicate with another device over first and second physical wireless channels, respectively. The MAC module may be configured to provide data to the first physical layer module for transmission to the another device over the first physical wireless channel, where the first physical wireless channel is associated with a first link parameter. The MAC module may be further configured to facilitate initializing the second physical wireless channel based at least in part on the first link parameter of the first physical wireless channel, and after initialization of the second physical wireless channel, provide second data to the second physical layer module for transmission to the another device over the second physical wireless channel.Type: ApplicationFiled: January 22, 2021Publication date: May 13, 2021Inventors: Vinko ERCEG, Mark GONIKBERG, Rohit GAIKWAD, Hongyu XIE, Anand IYER, Venkat KODAVATI, Tirdad SOWLATI, Payam TORAB JAHROMI, Matthew J. FISCHER
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Patent number: 10932262Abstract: A device implementing unified coordination of wireless communications over multiple physical layers may include a MAC module communicatively coupled to first and second physical layer modules that are each configured to communicate with another device over first and second physical wireless channels, respectively. The MAC module may be configured to provide data to the first physical layer module for transmission to the another device over the first physical wireless channel, where the first physical wireless channel is associated with a first link parameter. The MAC module may be further configured to facilitate initializing the second physical wireless channel based at least in part on the first link parameter of the first physical wireless channel, and after initialization of the second physical wireless channel, provide second data to the second physical layer module for transmission to the another device over the second physical wireless channel.Type: GrantFiled: June 7, 2017Date of Patent: February 23, 2021Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Vinko Erceg, Mark Gonikberg, Rohit Gaikwad, Hongyu Xie, Anand Iyer, Venkat Kodavati, Tirdad Sowlati, Payam Torab Jahromi, Matthew J. Fischer
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Patent number: 10873138Abstract: A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A cyclic staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.Type: GrantFiled: April 25, 2018Date of Patent: December 22, 2020Assignee: Avago Technologies International Sales Pte. LimitedInventors: Bevin George Perumana, Seunghwan Yoon, Bagher Afshar, Saikat Sarkar, Ehsan Adabi Firouzjaei, Michael John Inglis Boers, Jesus Alfonso Castaneda, Tirdad Sowlati
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Patent number: 10681771Abstract: A device implementing unified media access control (MAC) for multiple physical layer devices may include at least one processor communicatively coupled to first and second physical layer modules that are configured to communicate with another device over first and second wireless channels, respectively. The at least one processor may be configured to receive one or more data items to be transmitted to the another device and to select at least one of the first or second physical layer modules for transmission of the one or more data items based at least in part on a first condition of the first physical wireless channel and a condition of the second physical wireless channel. The at least one processor may be further configured to provide the one or more data items to the selected at least one of the first or second physical layer modules for transmission to the another device.Type: GrantFiled: February 28, 2019Date of Patent: June 9, 2020Assignee: Avago Technologies International Sales Pte. LimitedInventors: Vinko Erceg, Mark Gonikberg, Rohit Gaikwad, Hongyu Xie, Anand Iyer, Venkat Kodavati, Tirdad Sowlati, Payam Torab Jahromi, Matthew J. Fischer
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Publication number: 20190356321Abstract: A stacked synthesizer for wide local oscillator (LO) generation using a dynamic divider. The phase locked loop can include a plurality of voltage controlled oscillators (VCOs), and a selector that can be configured to select an output of one of the plurality of VCOs. The selected output of one of the plurality of VCOs can be provided to an on-chip dynamic divider and to an off-chip dynamic divider for LO sharing. The dynamic dividers can be configured to generate synthesizer outputs based on a multiplication of the selected output of one of the plurality of VCOs by a factor (1+1/M), where M is a variable number.Type: ApplicationFiled: May 17, 2018Publication date: November 21, 2019Inventors: Igal Kushnir, Hung-Ming Chien, Wei-Hong Chen, Theodoros Chalvatzis, Seunghwan Yoon, Chin-Ming Chien, Tirdad Sowlati, Moche Cohen, Kobi Sturkovich, Shaul Klein
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Patent number: 10419043Abstract: Systems and methods are provided for millimeter-wave (MMW) communication, the system includes a transceiver chip to generate and to receive signals. An interface is used to communicate the signals between the transceiver chip and one or more active antenna modules. The signals include modulated MMW signals and control signals. The transceiver chip includes baseband circuitry, up and down conversion mixers, and RF front-end circuitry. An active antenna module receives a first modulated MMW signal from the interface for transmission via antennas and to receive a second modulated MMW signal from the antennas for transmission through the interface to the transceiver chip.Type: GrantFiled: February 13, 2019Date of Patent: September 17, 2019Assignee: Avago Technologies International Sales PTE. LimitedInventors: Bevin George Perumana, Saikat Sarkar, Tirdad Sowlati
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Publication number: 20190200415Abstract: A device implementing unified media access control (MAC) for multiple physical layer devices may include at least one processor communicatively coupled to first and second physical layer modules that are configured to communicate with another device over first and second wireless channels, respectively. The at least one processor may be configured to receive one or more data items to be transmitted to the another device and to select at least one of the first or second physical layer modules for transmission of the one or more data items based at least in part on a first condition of the first physical wireless channel and a condition of the second physical wireless channel. The at least one processor may be further configured to provide the one or more data items to the selected at least one of the first or second physical layer modules for transmission to the another device.Type: ApplicationFiled: February 28, 2019Publication date: June 27, 2019Inventors: Vinko ERCEG, Mark GONIKBERG, Rohit GAIKWAD, Hongyu XIE, Anand IYER, Venkat KODAVATI, Tirdad SOWLATI, Payam TORAB JAHROMI, Matthew J. FISCHER
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Publication number: 20190181894Abstract: Systems and methods are provided for millimeter-wave (MMW) communication, the system includes a transceiver chip to generate and to receive signals. An interface is used to communicate the signals between the transceiver chip and one or more active antenna modules. The signals include modulated MMW signals and control signals. The transceiver chip includes baseband circuitry, up and down conversion mixers, and RF front-end circuitry. An active antenna module receives a first modulated MMW signal from the interface for transmission via antennas and to receive a second modulated MMW signal from the antennas for transmission through the interface to the transceiver chip.Type: ApplicationFiled: February 13, 2019Publication date: June 13, 2019Inventors: Bevin George Perumana, Saikat Sarkar, Tirdad Sowlati
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Patent number: 10270717Abstract: A device implementing unified media access control (MAC) for multiple physical layer devices may include a MAC module communicatively coupled to first and second physical layer modules that are configured to communicate with another device over first and second physical wireless channels, respectively. The MAC module may be configured to receive one or more data items to be transmitted to the another device and to select at least one of the first or second physical layer modules for transmission of the one or more data items based at least in part on a first wireless link quality of the first physical wireless channel and a second wireless link quality of the second physical wireless channel. The MAC module may be further configured to provide the one or more data items to the selected at least one of the first or second physical layer modules for transmission to another device.Type: GrantFiled: May 24, 2017Date of Patent: April 23, 2019Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Vinko Erceg, Mark Gonikberg, Rohit Gaikwad, Hongyu Xie, Anand Iyer, Venkat Kodavati, Tirdad Sowlati, Payam Torab Jahromi, Matthew J. Fischer
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Patent number: 10263652Abstract: Systems and methods are provided for millimeter-wave (MMW) communication, the system includes a transceiver chip to generate and to receive signals. An interface is used to communicate the signals between the transceiver chip and one or more active antenna modules. The signals include modulated MMW signals and control signals. The transceiver chip includes baseband circuitry, up and down conversion mixers, and RF front-end circuitry. An active antenna module receives a first modulated MMW signal from the interface for transmission via antennas and to receive a second modulated MMW signal from the antennas for transmission through the interface to the transceiver chip.Type: GrantFiled: June 30, 2016Date of Patent: April 16, 2019Assignee: Avago Technologies International Sales PTE. LimitedInventors: Bevin George Perumana, Saikat Sarkar, Tirdad Sowlati
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Patent number: 10256865Abstract: A bidirectional time-division duplexing transceiver circuit includes a first and a second bidirectional phase-shift circuit, and a bidirectional amplifier circuit including a first amplifier circuit and a second amplifier circuit. The first amplifier circuit and the second amplifier circuit are coupled via double-pole-double-throw (DPDT) switches to radio-frequency (RF) antennas and the first and the second bidirectional phase-shift circuits. The (DPDT) switches enable the first amplifier circuit and the second amplifier circuit to be operable simultaneously as transmit (TX) path amplifiers in a first time slot and as a receive (RX) path amplifiers in a second time slot.Type: GrantFiled: October 28, 2016Date of Patent: April 9, 2019Assignee: Avago Technologies International Sales PTE. LimitedInventors: Bevin George Perumana, Tirdad Sowlati, Saikat Sarkar, Seunghwan Yoon
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Patent number: 10158508Abstract: Methods, systems, and apparatuses are described for generating a phase-shifted signal in a transmit path and a receive path of a transceiver. When transmitting, a quadrature hybrid in the transmit path generates at least one in-phase signal and at least one quadrature signal based on a modulated signal. Phase shifters generate phase-shifted versions of the modulated signal based on a combination of these signals. When receiving, antennas receive a modulated signal and provide the modulated signal to phase shifters in the receive path. Each phase shifter modifies its received modulated signal. A matching network combines each of the modified modulated signals and provides at least one combined modulated signal to a quadrature hybrid. The quadrature hybrid generates a phase-shifted version of the modulated signal based on the at least one combined signal.Type: GrantFiled: July 21, 2016Date of Patent: December 18, 2018Assignee: Avago Technologies International Sales Pte. LimitedInventors: Michael Boers, Wei Liat Chan, Tirdad Sowlati, Bevin Perumana
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Publication number: 20180338310Abstract: A device implementing unified coordination of wireless communications over multiple physical layers may include a MAC module communicatively coupled to first and second physical layer modules that are each configured to communicate with another device over first and second physical wireless channels, respectively. The MAC module may be configured to provide data to the first physical layer module for transmission to the another device over the first physical wireless channel, where the first physical wireless channel is associated with a first link parameter. The MAC module may be further configured to facilitate initializing the second physical wireless channel based at least in part on the first link parameter of the first physical wireless channel, and after initialization of the second physical wireless channel, provide second data to the second physical layer module for transmission to the another device over the second physical wireless channel.Type: ApplicationFiled: June 7, 2017Publication date: November 22, 2018Inventors: Vinko ERCEG, Mark GONIKBERG, Rohit GAIKWAD, Hongyu XIE, Anand IYER, Venkat KODAVATI, Tirdad SOWLATI, Payam TORAB JAHROMI, Matthew J. FISCHER
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Patent number: 10135482Abstract: A wireless communication device includes a first circuit including a baseband circuit and a radio circuit, and at least one frontend module (FEM) remote from the first circuit and placed in close proximity to and coupled to at least one radio-frequency (RF) antenna. The FEM is coupled to the first circuit via interface circuitry. An FEM comprises a frontend (FE) circuit including one or more low-noise amplifiers (LNAs), one or more power amplifiers (PAs), and at least one of a multi-pole switch and a multiplexer. The multi-pole switch and the multiplexer being implemented on a first side of the FEM coupled to the interface circuitry. The interface circuitry includes at least some of filters, splitters, multi-pole switches, and multiplexers to reduce a count of interconnect routes to the at least one FEM.Type: GrantFiled: March 20, 2017Date of Patent: November 20, 2018Assignee: Avago Technologies General IP (Singapore) PTE. LTD.Inventors: Andrew Robert Adams, Ali Afsahi, Arya Reza Behzad, Keith Andrews Carter, Hooman Darabi, Rohit V. Gaikwad, Dandan Li, Jianping Peng, Jacob Jude Rael, Tirdad Sowlati