Patents by Inventor Saikat Sarkar
Saikat Sarkar 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: 20230254001Abstract: This disclosure is directed to power gain variation compensation of Radio Frequency (RF) receivers based on temperature variations. An RF receiver may include amplification circuitry having a chain of multiple amplifiers and/or passive elements. Multiple distributed and/or lumped attenuators disposed at different points between amplifiers and/or passive elements of the chain may attenuate a received RF signal to compensate for gain variations of the multiple amplifiers and/or passive elements caused by a temperature change. Accordingly, the distributed and/or lumped attenuators may improve linear response of the amplifiers and/or passive elements and signal-to-noise and distortion ratio of RF signals received at the receiver.Type: ApplicationFiled: February 8, 2022Publication date: August 10, 2023Inventors: Saikat Sarkar, Xiang Guan
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Publication number: 20230086630Abstract: This disclosure provide various techniques for improving the quality of a signal. By integrating phase-shifting circuitry with a transmit/receive (T/R) switch, insertion loss may be reduced while decreasing space consumed on an integrated circuit or printed circuit board. In particular, embodiments disclosed herein include a transmitter and a receiver, each including one or more differential amplifiers coupled to a first inductor, and a switching network coupled to a second inductor and one or more phase-shifting circuitries. A differential interface of the differential amplifiers may enable integration of a stage of the phase shifter (e.g., a 180 degree stage) with the T/R switch, such that a single circuit may operate as the phase shifter and the T/R switch. This implementation may reduce the number of T/R switches and phase shifter stages in the phased array system, reducing the overall insertion loss experienced by the phased array system.Type: ApplicationFiled: September 16, 2022Publication date: March 23, 2023Inventors: Behzad Biglarbegian, Saikat Sarkar
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Publication number: 20230088332Abstract: This disclosure provide various techniques for improving the quality of a signal. By integrating phase-shifting circuitry with a transmit/receive (T/R) switch, insertion loss may be reduced while decreasing space consumed on an integrated circuit or printed circuit board. In particular, embodiments disclosed herein include a transmitter and a receiver, each including one or more differential amplifiers coupled to a first inductor, and a switching network coupled to a second inductor and one or more phase-shifting circuitries. A differential interface of the differential amplifiers may enable integration of a stage of the phase shifter (e.g., a 180 degree stage) with the T/R switch, such that a single circuit may operate as the phase shifter and the T/R switch. This implementation may reduce the number of T/R switches and phase shifter stages in the phased array system, reducing the overall insertion loss experienced by the phased array system.Type: ApplicationFiled: September 21, 2021Publication date: March 23, 2023Inventors: Behzad Biglarbegian, Saikat Sarkar
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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: 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: 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: 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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Publication number: 20180241137Abstract: 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: ApplicationFiled: April 25, 2018Publication date: August 23, 2018Applicant: Avago Technologies General IP (Singapore) Pte. Ltd .Inventors: 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: 10020555Abstract: An electronic device includes circuitry configured to determine an antenna operation mode for one or more antenna arrays. The circuitry is further configured to control the one or more antenna arrays to operate in a combined antenna mode via a Wilkinson combiner. The circuitry is also configured to control the one or more antenna arrays to operate in an isolated antenna mode via a single-pole, multi-throw switch.Type: GrantFiled: September 15, 2015Date of Patent: July 10, 2018Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: Saikat Sarkar, Seunghwan Yoon, Bagher Afshar, Michael Boers, Jesus Castaneda, Tirdad Sowlati
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Patent number: 9985357Abstract: 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 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: December 13, 2013Date of Patent: May 29, 2018Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTDInventors: 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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Publication number: 20170346506Abstract: 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: June 30, 2016Publication date: November 30, 2017Inventors: Bevin George PERUMANA, Saikat SARKAR, Tirdad SOWLATI
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Publication number: 20170338854Abstract: 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: ApplicationFiled: October 28, 2016Publication date: November 23, 2017Inventors: Bevin George PERUMANA, Tirdad Sowlati, Saikat Sarkar, Seunghwan Yoon
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Publication number: 20170047667Abstract: An electronic device includes circuitry configured to determine an antenna operation mode for one or more antenna arrays. The circuitry is further configured to control the one or more antenna arrays to operate in a combined antenna mode via a Wilkinson combiner. The circuitry is also configured to control the one or more antenna arrays to operate in an isolated antenna mode via a single-pole, multi-throw switch.Type: ApplicationFiled: September 15, 2015Publication date: February 16, 2017Applicant: BROADCOM CORPORATIONInventors: Saikat SARKAR, Seunghwan YOON, Bagher AFSHAR, Michael BOERS, Jesus CASTANEDA, Tirdad SOWLATI
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Publication number: 20150123873Abstract: 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 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: ApplicationFiled: December 13, 2013Publication date: May 7, 2015Inventors: 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: 8768270Abstract: A TX/RX switch includes a first switching device connectable with a power amplifier and a second switching device connectable with a low noise amplifier. Both the first switching device and the second switching device are operating in an ON state in transmit mode to provide substantial linearity including no significant alternating current signal swing across any two nodes of the first switching device and the second switching device in the ON state.Type: GrantFiled: June 12, 2012Date of Patent: July 1, 2014Assignee: Broadcom CorporationInventors: Bevin George Perumana, Saikat Sarkar, Michael Boers
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Publication number: 20140098909Abstract: A receiver system and a demodulator system are configured to receive and demodulate, respectively, multi-gigabit millimeter wave signals being wirelessly transmitted in the unlicensed wireless band near 60 GHz.Type: ApplicationFiled: December 10, 2013Publication date: April 10, 2014Applicant: Georgia Tech Research CorporationInventors: Eric Juntunen, Stephanie Pinel, Joy Laskar, David Yeh, Saikat Sarkar
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Publication number: 20130331043Abstract: A TX/RX switch includes a first switching device connectable with a power amplifier and a second switching device connectable with a low noise amplifier. Both the first switching device and the second switching device are operating in an ON state in transmit mode to provide substantial linearity including no significant alternating current signal swing across any two nodes of the first switching device and the second switching device in the ON state.Type: ApplicationFiled: June 12, 2012Publication date: December 12, 2013Applicant: Broadcom CorporationInventors: Bevin George Perumana, Saikat Sarkar, Michael Boers
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Patent number: 8605826Abstract: A receiver system and a demodulator system are configured to receive and demodulate, respectively, multi-gigabit millimeter wave signals being wirelessly transmitted in the unlicensed wireless band near 60 GHz.Type: GrantFiled: August 4, 2010Date of Patent: December 10, 2013Assignee: Georgia Tech Research CorporationInventors: Eric Juntunen, Stephane Pinel, Joy Laskar, David Yeh, Saikat Sarkar
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Patent number: 8081948Abstract: An analog multi-gigabit receiver and/or transceiver can be implemented for the reception and demodulation of multi-gigabits quadrature phase shift keying (QPSK) modulated using a CMOS (complementary metal-oxide semiconductor) process. Further, an analog multi-gigabit receiver and/or transceiver can be implemented for the reception and demodulation of multi-gigabits binary phase shift keying (BPSK), minimum shift keying (MSK), and/or amplitude shift keying (ASK) signal modulated in CMOS processes.Type: GrantFiled: October 25, 2007Date of Patent: December 20, 2011Assignee: Georgia Tech Research CorporationInventors: Stephane Pinel, Joy Laskar, David Yeh, Bevin George Perumana, Saikat Sarkar