Patents by Inventor Vijay Gadde
Vijay Gadde 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: 20190296789Abstract: A wireless communication device (UE) may conduct wireless communications using one or more antennas according to multiple radio access technologies (RAT) associated with corresponding operating frequency bands. The UE may perform adaptive antenna tuning, for example, application-based antenna tuning for increasing the operating efficiency of the UE, which may improve user experience. The UE may periodically identify one or more applications running on the UE, the respective RATs that support the (running) applications, and which of the corresponding frequency bands are used by the (running) applications. The UE may determine the tuner device settings for tuning the one or more antenna(s) based on the (running) applications or the type and/or priority of the (running) applications, which RATs support the running applications, which of the corresponding frequency bands are used by the (running) applications, and operating conditions associated with the frequency bands used by the (running) applications.Type: ApplicationFiled: March 18, 2019Publication date: September 26, 2019Inventors: Dongchang Yu, Ming Hu, Hailong Yang, Tarakkumar G. Dhanani, Vijay Gadde, Xueting Liu, Dikshit Garg, Neeraj D. Vaghela, Mohit Narang, Sharad Garg
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Patent number: 10270441Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: GrantFiled: August 24, 2017Date of Patent: April 23, 2019Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Publication number: 20180019752Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: ApplicationFiled: August 24, 2017Publication date: January 18, 2018Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Patent number: 9780784Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: GrantFiled: June 24, 2016Date of Patent: October 3, 2017Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Publication number: 20170012623Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: ApplicationFiled: June 24, 2016Publication date: January 12, 2017Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Patent number: 9389637Abstract: A source-synchronous communication system in which a first integrated circuit (IC) conveys a data signal and concomitant strobe signal to a second IC. One or both ICs support hysteresis for the strobe channel that allows the second IC to distinguish between strobe preambles and noise, and thus prevent the false triggering of data capture. Hysteresis may also be employed to quickly settle the strobe channel to an inactive level after receipt of a strobe postamble.Type: GrantFiled: April 22, 2013Date of Patent: July 12, 2016Assignee: Rambus Inc.Inventors: Huy Nguyen, Vijay Gadde, Kambiz Kaviani, Thomas Giovannini, Todd Bystrom
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Patent number: 9391613Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: GrantFiled: October 15, 2015Date of Patent: July 12, 2016Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Publication number: 20160142053Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: ApplicationFiled: October 15, 2015Publication date: May 19, 2016Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Patent number: 9191243Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: GrantFiled: September 25, 2012Date of Patent: November 17, 2015Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Patent number: 8988100Abstract: Described are amplifiers that facilitate high-speed communication with calibrated drive strength and termination impedance. Drivers and termination elements can be divided into a number N of parallel portions, one or more of which can be disabled and updated without interfering with signal (e.g., clock or data) transmission. Some embodiments identify inactive elements by examining incoming signals.Type: GrantFiled: August 6, 2012Date of Patent: March 24, 2015Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Sivakumar Doraiswamy
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Publication number: 20130290766Abstract: A source-synchronous communication system in which a first integrated circuit (IC) conveys a data signal and concomitant strobe signal to a second IC. One or both ICs support hysteresis for the strobe channel that allows the second IC to distinguish between strobe preambles and noise, and thus prevent the false triggering of data capture. Hysteresis may also be employed to quickly settle the strobe channel to an inactive level after receipt of a strobe postamble.Type: ApplicationFiled: April 22, 2013Publication date: October 31, 2013Applicant: Rambus Inc.Inventors: Huy Nguyen, Vijay Gadde, Kambiz Kaviani, Thomas Giovannini, Todd Bystrom
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Patent number: 8384423Abstract: A memory controller includes a transmit circuit coupled to an output node and a receive circuit coupled to an input node. The transmit circuit transmits first data to a memory device through the output node and the receive circuit is configured to receive second data from the memory device through the input node. The memory controller includes a calibration circuit and control logic coupled to the calibration circuit, where the calibration circuit and the control logic are configured to select a first reference voltage and a driver impedance for the transmit circuit and are configured to select a second reference voltage and a termination impedance for the receive circuit. The first reference voltage, the second reference voltage, the driver impedance and the termination impedance are selected from a set of pre-determined values, which are associated with different signaling modes for communication of the first data and the second data.Type: GrantFiled: May 20, 2008Date of Patent: February 26, 2013Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Bret G. Stott
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Publication number: 20130021056Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: ApplicationFiled: September 25, 2012Publication date: January 24, 2013Applicant: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Publication number: 20120299619Abstract: Described are amplifiers that facilitate high-speed communication with calibrated drive strength and termination impedance. Drivers and termination elements can be divided into a number N of parallel portions, one or more of which can be disabled and updated without interfering with signal (e.g., clock or data) transmission. Some embodiments identify inactive elements by examining incoming signals.Type: ApplicationFiled: August 6, 2012Publication date: November 29, 2012Applicant: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Sivakumar Doriaswamy
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Patent number: 8278968Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: GrantFiled: April 18, 2011Date of Patent: October 2, 2012Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Patent number: 8237468Abstract: Described are amplifiers that facilitate high-speed communication with calibrated drive strength and termination impedance. Drivers and termination elements can be divided into a number N of parallel portions, one or more of which can be disabled and updated without interfering with signal (e.g., clock or data) transmission. Some embodiments identify inactive elements by examining incoming signals.Type: GrantFiled: August 3, 2010Date of Patent: August 7, 2012Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Sivakumar Doraiswamy
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Patent number: 8233332Abstract: A data system component having a state machine circuit and receivers that utilize high and low threshold signals permits accurate detection of strobe signal pattern edges such as those for preamble, burst and post-amble conditions in the strobe signal. The state machine circuit may then be configured to set conditions associated with further circuit elements such as for power saving, data reception, on-die termination, etc. based on the conditions detected in the strobe signal to improve data or memory system performance. The components may be implemented as part of memory controllers and/or memory such as a dynamic random access memory and used in memory read and write operations.Type: GrantFiled: January 28, 2011Date of Patent: July 31, 2012Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Bret G. Stott
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Publication number: 20110249514Abstract: A data system component having a state machine circuit and receivers that utilize high and low threshold signals permits accurate detection of strobe signal pattern edges such as those for preamble, burst and post-amble conditions in the strobe signal. The state machine circuit may then be configured to set conditions associated with further circuit elements such as for power saving, data reception, on-die termination, etc. based on the conditions detected in the strobe signal to improve data or memory system performance. The components may be implemented as part of memory controllers and/or memory such as a dynamic random access memory and used in memory read and write operations.Type: ApplicationFiled: January 28, 2011Publication date: October 13, 2011Inventors: Huy M. Nguyen, Vijay Gadde, Bret-G. Stott
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Publication number: 20110193591Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: RAMBUS INC.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau
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Patent number: 7928757Abstract: Described are on-die termination (ODT) systems and methods that facilitate high-speed communication between a driver die and a receiver die interconnected via one or more signal transmission lines. An ODT control system in accordance with one embodiment calibrates and maintains termination resistances and drive currents to produce optimal output swing voltages. Comparison circuitry employed to calibrate the reference resistance is also used to calibrate the drive current. Termination elements in some embodiments are divided into two adjustable resistive portions, both of which are designed to minimize capacitive loading. One portion is optimized to produce a relatively high range of adjustment, while the other is optimized for fine-tuning and glitch-free switching.Type: GrantFiled: June 21, 2010Date of Patent: April 19, 2011Assignee: Rambus Inc.Inventors: Huy M. Nguyen, Vijay Gadde, Benedict Lau