Patents by Inventor Ganesh Balamurugan
Ganesh Balamurugan 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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Polarization de-multiplexing for intensity-modulated direct-detection (IM-DD) optical communications
Patent number: 11754861Abstract: Embodiments include apparatuses, methods, and systems including a dynamic polarization controller (DPC) to receive a first light beam and a second light beam, to adjust a rotation of a state of polarization (SOP) of the first light beam and the second light beam to generate a third light beam and a fourth light beam, under the control of a first control signal, a second control signal, and a third control signal. The first control signal may be related to a phase difference between the third light beam and the fourth light beam, the second control signal may be related to an intensity difference between the third light beam and the fourth light beam, and the third control signal may be related to a rotation of a SOP of the third light beam and the fourth light beam. Other embodiments may also be described and claimed.Type: GrantFiled: June 28, 2021Date of Patent: September 12, 2023Assignee: INTEL CORPORATIONInventors: Taehwan Kim, Ganesh Balamurugan, Hao Li, Hasitha Jayatilleka -
Patent number: 11722128Abstract: An apparatus is provided, where the apparatus includes a plurality of components; a first circuitry to generate a clock signal, and to supply the clock signal to the plurality of components; a second circuitry to estimate, for each of two or more components of the plurality of components, a corresponding duty cycle of the clock signal received at the corresponding component, wherein two or more duty cycles corresponding to the two or more components are determined; a third circuitry to determine an average of the two or more duty cycles; and a fourth circuitry to correct a duty cycle of the clock signal generated by the first circuitry, based at least in part on the average.Type: GrantFiled: June 24, 2021Date of Patent: August 8, 2023Assignee: Intel CorporationInventors: Aaron Martin, Roger Cheng, Hari Venkatramani, Navneet Dour, Mozhgan Mansuri, Bryan Casper, Frank O'Mahony, Ganesh Balamurugan, Ajay Balankutty, Kuan Zhou, Sridhar Tirumalai, Krishnamurthy Venkataramana, Alex Thomas, Quoc Nguyen
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Publication number: 20220182149Abstract: Embodiments herein relate to techniques for baseline wander (BLW) compensation. The technique may include identifying a data stream that is to be modulated by a ring modulator of an optical transmitter, wherein the data stream has a frequency operable to cause thermal-based BLW of an optical output of the optical transmitter. The technique may further include adjusting a time-varying direct current (DC) voltage bias of the ring modulator based on the frequency of the data stream. Other embodiments may be described and/or claimed.Type: ApplicationFiled: February 21, 2022Publication date: June 9, 2022Inventors: Taehwan KIM, Hao LI, Meer Nazmus SAKIB, Haisheng RONG, Ganesh BALAMURUGAN, Sanjeev GUPTA, Jin HONG, Nikolai FEDIAKINE
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POLARIZATION DE-MULTIPLEXING FOR INTENSITY-MODULATED DIRECT-DETECTION (IM-DD) OPTICAL COMMUNICATIONS
Publication number: 20210325701Abstract: Embodiments include apparatuses, methods, and systems including a dynamic polarization controller (DPC) to receive a first light beam and a second light beam, to adjust a rotation of a state of polarization (SOP) of the first light beam and the second light beam to generate a third light beam and a fourth light beam, under the control of a first control signal, a second control signal, and a third control signal. The first control signal may be related to a phase difference between the third light beam and the fourth light beam, the second control signal may be related to an intensity difference between the third light beam and the fourth light beam, and the third control signal may be related to a rotation of a SOP of the third light beam and the fourth light beam. Other embodiments may also be described and claimed.Type: ApplicationFiled: June 28, 2021Publication date: October 21, 2021Inventors: Taehwan Kim, Ganesh Balamurugan, Hao Li -
Publication number: 20210320652Abstract: An apparatus is provided, where the apparatus includes a plurality of components; a first circuitry to generate a clock signal, and to supply the clock signal to the plurality of components; a second circuitry to estimate, for each of two or more components of the plurality of components, a corresponding duty cycle of the clock signal received at the corresponding component, wherein two or more duty cycles corresponding to the two or more components are determined; a third circuitry to determine an average of the two or more duty cycles; and a fourth circuitry to correct a duty cycle of the clock signal generated by the first circuitry, based at least in part on the average.Type: ApplicationFiled: June 24, 2021Publication date: October 14, 2021Applicant: Intel CorporationInventors: Aaron Martin, Roger Cheng, Hari Venkatramani, Navneet Dour, Mozhgan Mansuri, Bryan Casper, Frank O'Mahony, Ganesh Balamurugan, Ajay Balankutty, Kuan Zhou, Sridhar Tirumalai, Krishnamurthy Venkataramana, Alex Thomas, Quoc Nguyen
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Patent number: 11137283Abstract: Embodiments of the present disclosure are directed toward techniques and configurations for a photonic apparatus with a photodetector with bias control to provide substantially constant responsivity. The apparatus includes a first photodetector, to receive an optical input and provide a corresponding electrical output; a second photodetector coupled with the first photodetector, wherein the second photodetector is free from receipt of the optical input; and circuitry coupled with the first and second photodetectors, to generate a bias voltage, based at least in part on a dark current generated by the second photodetector in an absence of the optical input, and provide the generated bias voltage to the first photodetector. The first photodetector is to provide a substantially constant ratio of the electrical output to optical input in response to the provision of the generated bias voltage. Additional embodiments may be described and claimed.Type: GrantFiled: May 3, 2019Date of Patent: October 5, 2021Assignee: Intel CorporationInventors: Ganesh Balamurugan, Haisheng Rong, Meer Nazmus Sakib, Hao Li
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Polarization de-multiplexing for intensity-modulated direct-detection (IM-DD) optical communications
Patent number: 11126018Abstract: Embodiments include apparatuses, methods, and systems including a dynamic polarization controller (DPC) to receive a first light beam and a second light beam, to adjust a rotation of a state of polarization (SOP) of the first light beam and the second light beam to generate a third light beam and a fourth light beam, under the control of a first control signal, a second control signal, and a third control signal. The first control signal may be related to a phase difference between the third light beam and the fourth light beam, the second control signal may be related to an intensity difference between the third light beam and the fourth light beam, and the third control signal may be related to a rotation of a SOP of the third light beam and the fourth light beam. Other embodiments may also be described and claimed.Type: GrantFiled: December 7, 2017Date of Patent: September 21, 2021Assignee: INTEL CORPORATIONInventors: Taehwan Kim, Ganesh Balamurugan, Hao Li, Hasitha Jayatilleka -
Patent number: 11126581Abstract: Described is a reconfigurable transmitter which includes: a first pad; a second pad; a first single-ended driver coupled to the first pad; a second single-ended driver to the second pad; a differential driver coupled to the first and second pads; and a logic unit to enable of the first and second single-ended drivers, or to enable the differential driver.Type: GrantFiled: May 22, 2020Date of Patent: September 21, 2021Assignee: Intel CorporationInventors: Tzu-Chien Hsueh, Ganesh Balamurugan, Bryan K. Casper
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Patent number: 11070200Abstract: An apparatus is provided, where the apparatus includes a plurality of components; a first circuitry to generate a clock signal, and to supply the clock signal to the plurality of components; a second circuitry to estimate, for each of two or more components of the plurality of components, a corresponding duty cycle of the clock signal received at the corresponding component, wherein two or more duty cycles corresponding to the two or more components are determined; a third circuitry to determine an average of the two or more duty cycles; and a fourth circuitry to correct a duty cycle of the clock signal generated by the first circuitry, based at least in part on the average.Type: GrantFiled: September 27, 2018Date of Patent: July 20, 2021Assignee: Intel CorporationInventors: Aaron Martin, Roger Cheng, Hari Venkatramani, Navneet Dour, Mozhgan Mansuri, Bryan Casper, Frank O'Mahony, Ganesh Balamurugan, Ajay Balankutty, Kuan Zhou, Sridhar Tirumalai, Krishnamurthy Venkataramana, Alex Thomas, Quoc Nguyen
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Publication number: 20210149115Abstract: The present disclosure is directed to photonic wavelength division multiplexing (WDM) receivers with polarization diversity and/or low reflectance. In embodiments, a WDM receiver is provided with a splitter, a plurality of waveguides and a plurality of photodetectors in series. The waveguides having particular equal path lengths relationship from the splitter to respective ones of the photodetectors. In other embodiments, the WDM receiver is provided with a splitter, a looped waveguide, a plurality of photodetectors, and a plurality of variable optical attenuators (VOAs). The VOAs are configured to suppress reflection of signal beams back to the transmitter. In various embodiments, the WDM receiver is a receiver sub-assembly of a silicon photonic transceiver disposed in a silicon package. Other embodiments may be described and/or claimed.Type: ApplicationFiled: December 23, 2020Publication date: May 20, 2021Inventors: Duanni Huang, Saeed Fathololoumi, Meer Nazmus Sakib, Mohammad Montazeri Najafabadi, Chaoxuan Ma, David Hui, Taehwan Kim, Ling Liao, Hao Li, Ganesh Balamurugan, Haisheng Rong, Aliasghar Eftekhar
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Publication number: 20210119710Abstract: Embodiments described herein may be related to apparatuses, processes, and techniques related to coherent optical receivers, including coherent receivers with integrated all-silicon waveguide photodetectors and tunable local oscillators implemented within CMOS technology. Embodiments are also directed to tunable silicon hybrid lasers with integrated temperature sensors to control wavelength. Embodiments are also directed to post-process phase correction of optical hybrid and nested I/Q modulators. Embodiments are also directed to demultiplexing photodetectors based on multiple microrings. In embodiments, all components may be implements on a silicon substrate. Other embodiments may be described and/or claimed.Type: ApplicationFiled: December 23, 2020Publication date: April 22, 2021Inventors: Meer Nazmus Sakib, Peicheng Liao, Ranjeet Kumar, Duanni Huang, Haisheng Rong, Harel Frish, John Heck, Chaoxuan Ma, Hao Li, Ganesh Balamurugan
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Patent number: 10924305Abstract: Disclosed herein are devices and methods to facilitate compensating for intra-pair skew in a high-definition multimedia interface (HDMI) system. One or more skew training pattern may be transmitted on a signal line including a differential pair. Acknowledgment of receiving the skew training pattern may be received on a display data channel (DDC) associated with HDMI system. The skew training pattern may be used to ascertain and compensate for intra-pair skew.Type: GrantFiled: June 6, 2017Date of Patent: February 16, 2021Assignee: Intel CorporationInventors: Aruna Kumar, Anoop Karunan, Ganesh Balamurugan, Prakash Radhakrishnan
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Publication number: 20200356516Abstract: Described is a reconfigurable transmitter which includes: a first pad; a second pad; a first single-ended driver coupled to the first pad; a second single-ended driver to the second pad; a differential driver coupled to the first and second pads; and a logic unit to enable of the first and second single-ended drivers, or to enable the differential driver.Type: ApplicationFiled: May 22, 2020Publication date: November 12, 2020Applicant: Intel CorporationInventors: Tsu-Chien HSUEH, Ganesh BALAMURUGAN, Bryan K. Casper
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Publication number: 20200328915Abstract: Disclosed herein are devices and methods to facilitate compensating for intra-pair skew in a high-definition multimedia interface (HDMI) system. One or more skew training pattern may be transmitted on a signal line including a differential pair. Acknowledgment of receiving the skew training pattern may be received on a display data channel (DDC) associated with HDMI system. The skew training pattern may be used to ascertain and compensate for intra-pair skew.Type: ApplicationFiled: June 6, 2017Publication date: October 15, 2020Applicant: Intel CorporationInventors: Aruna KUMAR, Anoop KARUNAN, Ganesh BALAMURUGAN, Prakash RADHAKRISHNAN
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Patent number: 10664430Abstract: Described is a reconfigurable transmitter which includes: a first pad; a second pad; a first single-ended driver coupled to the first pad; a second single-ended driver to the second pad; a differential driver coupled to the first and second pads; and a logic unit to enable of the first and second single-ended drivers, or to enable the differential driver.Type: GrantFiled: January 25, 2019Date of Patent: May 26, 2020Assignee: Intel CorporationInventors: Tzu-Chien Hsueh, Ganesh Balamurugan, Bryan K. Casper
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Publication number: 20200106430Abstract: An apparatus is provided, where the apparatus includes a plurality of components; a first circuitry to generate a clock signal, and to supply the clock signal to the plurality of components; a second circuitry to estimate, for each of two or more components of the plurality of components, a corresponding duty cycle of the clock signal received at the corresponding component, wherein two or more duty cycles corresponding to the two or more components are determined; a third circuitry to determine an average of the two or more duty cycles; and a fourth circuitry to correct a duty cycle of the clock signal generated by the first circuitry, based at least in part on the average.Type: ApplicationFiled: September 27, 2018Publication date: April 2, 2020Applicant: Intel CorporationInventors: Aaron Martin, Roger Cheng, Hari Venkatramani, Navneet Dour, Mozhgan Mansuri, Bryan Casper, Frank O'Mahony, Ganesh Balamurugan, Ajay Balankutty, Kuan Zhou, Sridhar Tirumalai, Krishnamurthy Venkataramana, Alex Thomas, Quoc Nguyen
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Patent number: 10606004Abstract: Embodiments herein may relate to an optoelectronic receiver that includes a photonic integrated circuit (PIC) coupled with a light source. Respective PIC sections of the PIC may include a photodiode and a junction capacitor. The optoelectronic receiver may further include an electronic integrated circuit (EIC) coupled with the PIC. Respective EIC sections of the EIC may be communicatively coupled to respective ones of the PIC sections. Other embodiments may be described and/or claimed.Type: GrantFiled: June 1, 2018Date of Patent: March 31, 2020Assignee: Intel CorporationInventors: Jahnavi Sharma, Ganesh Balamurugan, Hao Li, Meer Nazmus Sakib, Haisheng Rong
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Publication number: 20190257688Abstract: Embodiments of the present disclosure are directed toward techniques and configurations for a photonic apparatus with a photodetector with bias control to provide substantially constant responsivity. The apparatus includes a first photodetector, to receive an optical input and provide a corresponding electrical output; a second photodetector coupled with the first photodetector, wherein the second photodetector is free from receipt of the optical input; and circuitry coupled with the first and second photodetectors, to generate a bias voltage, based at least in part on a dark current generated by the second photodetector in an absence of the optical input, and provide the generated bias voltage to the first photodetector. The first photodetector is to provide a substantially constant ratio of the electrical output to optical input in response to the provision of the generated bias voltage. Additional embodiments may be described and claimed.Type: ApplicationFiled: May 3, 2019Publication date: August 22, 2019Inventors: Ganesh Balamurugan, Haisheng Rong, Meer Nazmus Sakib, Hao Li
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Patent number: 10374419Abstract: An on-package interface. A first set of single-ended transmitter circuits on a first die. A first set of single-ended receiver circuits on a second die. The receiver circuits have a termination circuit comprising an inverter and a resistive feedback element. A plurality of conductive lines couple the first set of transmitter circuits and the first set of receiver circuits. The lengths of the plurality of conductive lines are matched.Type: GrantFiled: February 12, 2016Date of Patent: August 6, 2019Assignee: Intel CorporationInventors: Todd W. Mellinger, Michael E. Griffith, Ganesh Balamurugan, Thomas P. Thomas
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Patent number: 10347309Abstract: Embodiments include a resistor, coupled on a signal path, that includes one or more resistive memory elements, such as one or more magnetic tunnel junctions (MTJs). The resistance of the resistive memory elements may be digitally trimmable to adjust a resistance of the resistor on the signal path. The resistor may be incorporated into an analog or mixed signal circuit to pass an analog signal on the signal path. Other embodiments may be described and claimed.Type: GrantFiled: February 22, 2017Date of Patent: July 9, 2019Assignee: Intel CorporationInventors: Jaydeep P. Kulkarni, Ashoke Ravi, Dinesh Somasekhar, Ganesh Balamurugan, Sudip Shekhar, Tawfiq Musah, Tzu-Chien Hsueh