Patents by Inventor Robert K. Chen
Robert K. Chen 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: 20240077309Abstract: The present disclosure generally relates to displaying information related to a physical activity. In some embodiments, methods and user interfaces for managing the display of information related to a physical activity are described.Type: ApplicationFiled: January 12, 2023Publication date: March 7, 2024Inventors: Nicholas D. FELTON, James B. CARY, Edward CHAO, Kevin W. CHEN, Christopher P. FOSS, Eamon F. GILRAVI, Austen J. GREEN, Bradley W. GRIFFIN, Anders K. HAGLUNDS, Lori HYLAN-CHO, Stephen P. JACKSON, Matthew S. KOONCE, Paul T. NIXON, Robert M. PEARSON
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Patent number: 9276560Abstract: Various embodiments of the present invention provide systems and methods for data filter tuning. As an example, a method for filter tuning is disclosed that includes: providing a tunable filter having an operation filter and a calibration filter; applying a low frequency test input to the operation filter in place of an input signal to yield a first filter output; calculating a low frequency magnitude value corresponding to the first filter output; applying a high frequency test input to the operation filter in place of an input signal to yield a second filter output; calculating a high frequency magnitude value corresponding to the second filter output; modifying a tuning factor of the calibration filter when a ratio of the high frequency magnitude value and the low frequency magnitude value is outside of a defined range; and storing the tuning factor of the calibration filter when the ratio of the high frequency magnitude value and the low frequency magnitude value is within the defined range.Type: GrantFiled: September 10, 2013Date of Patent: March 1, 2016Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.Inventors: James A. Bailey, Robert K. Chen, Richard T. Kaul
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Patent number: 8816761Abstract: Various embodiments of the present invention provide tunable filter circuits and methods for using such. As an example, a tunable biquad filter is disclosed that includes a tunable biquad circuit, a mixer circuit and a low pass filter. The tunable biquad circuit exhibits a cutoff frequency corresponding to an adjustment value, and is operable to receive an filter input and to provide a filter output. The mixer circuit is operable to provide a product of the filter input and the filter output. The product includes a time dependent component and a static component. The low pass filter is operable to receive the product and to provide the static component.Type: GrantFiled: September 23, 2010Date of Patent: August 26, 2014Assignee: LSI CorporationInventors: James A. Bailey, Robert K. Chen, Richard T. Kaul
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Publication number: 20140012888Abstract: Various embodiments of the present invention provide systems and methods for data filter tuning. As an example, a method for filter tuning is disclosed that includes: providing a tunable filter having an operation filter and a calibration filter; applying a low frequency test input to the operation filter in place of an input signal to yield a first filter output; calculating a low frequency magnitude value corresponding to the first filter output; applying a high frequency test input to the operation filter in place of an input signal to yield a second filter output; calculating a high frequency magnitude value corresponding to the second filter output; modifying a tuning factor of the calibration filter when a ratio of the high frequency magnitude value and the low frequency magnitude value is outside of a defined range; and storing the tuning factor of the calibration filter when the ratio of the high frequency magnitude value and the low frequency magnitude value is within the defined range.Type: ApplicationFiled: September 10, 2013Publication date: January 9, 2014Applicant: LSI CorporationInventors: James A. Bailey, Robert K. Chen, Richard T. Kaul
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Patent number: 8560589Abstract: Various embodiments of the present invention provide systems and methods for data filter tuning. As an example, a method for filter tuning is disclosed that includes: providing a tunable filter having an operation filter and a calibration filter; applying a low frequency test input to the operation filter in place of an input signal to yield a first filter output; calculating a low frequency magnitude value corresponding to the first filter output; applying a high frequency test input to the operation filter in place of an input signal to yield a second filter output; calculating a high frequency magnitude value corresponding to the second filter output; modifying a tuning factor of the calibration filter when a ratio of the high frequency magnitude value and the low frequency magnitude value is outside of a defined range; and storing the tuning factor of the calibration filter when the ratio of the high frequency magnitude value and the low frequency magnitude value is within the defined range.Type: GrantFiled: September 23, 2010Date of Patent: October 15, 2013Assignee: LSI CorporationInventors: James A. Bailey, Robert K. Chen, Richard T. Kaul
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Publication number: 20120075012Abstract: Various embodiments of the present invention provide systems and methods for data filter tuning. As an example, a method for filter tuning is disclosed that includes: providing a tunable filter having an operation filter and a calibration filter; applying a low frequency test input to the operation filter in place of an input signal to yield a first filter output; calculating a low frequency magnitude value corresponding to the first filter output; applying a high frequency test input to the operation filter in place of an input signal to yield a second filter output; calculating a high frequency magnitude value corresponding to the second filter output; modifying a tuning factor of the calibration filter when a ratio of the high frequency magnitude value and the low frequency magnitude value is outside of a defined range; and storing the tuning factor of the calibration filter when the ratio of the high frequency magnitude value and the low frequency magnitude value is within the defined range.Type: ApplicationFiled: September 23, 2010Publication date: March 29, 2012Inventors: James A. Bailey, Robert K. Chen, Richard T. Kaul
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Publication number: 20120075011Abstract: Various embodiments of the present invention provide tunable filter circuits and methods for using such. As an example, a tunable biquad filter is disclosed that includes a tunable biquad circuit, a mixer circuit and a low pass filter. The tunable biquad circuit exhibits a cutoff frequency corresponding to an adjustment value, and is operable to receive an filter input and to provide a filter output. The mixer circuit is operable to provide a product of the filter input and the filter output. The product includes a time dependent component and a static component. The low pass filter is operable to receive the product and to provide the static component.Type: ApplicationFiled: September 23, 2010Publication date: March 29, 2012Inventors: James A. Bailey, Robert K. Chen, Richard T. Kaul
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Patent number: 6842518Abstract: An impedance warping circuit (IWC) and technique for compensating the effect of a blocking capacitor within a transformer of an interface circuit for passing plain old telephone service (POTS) band and asynchronous digital subscriber line (ADSL) band signals on signals having frequencies in the POTS band. The IWC does not significantly affect the performance of the interface circuit in the ADSL band. The IWC synthesizes impedance to compensate the frequency-dependent deviation in the termination impedance across the tip/ring lines. The resulting termination impedance may be designed to conform to the Telcordia Standard of 900 ?+2.16 ?F or other telecommunication standards throughout the entire POTS band.Type: GrantFiled: December 13, 2001Date of Patent: January 11, 2005Assignee: Legerity, Inc.Inventors: Robert K. Chen, John C. Gammel, Dewayne A. Spires
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Publication number: 20030112962Abstract: An impedance warping circuit (IWC) and technique for compensating the effect of a blocking capacitor within a transformer of an interface circuit for passing plain old telephone service (POTS) band and asynchronous digital subscriber line (ADSL) band signals on signals having frequencies in the POTS band. The IWC does not significantly affect the performance of the interface circuit in the ADSL band. The IWC synthesizes impedance to compensate the frequency-dependent deviation in the termination impedance across the tip/ring lines. The resulting termination impedance may be designed to conform to the Telcordia Standard of 900 &OHgr;+2.16 &mgr;F or other telecommunication standards throughout the entire POTS band.Type: ApplicationFiled: December 13, 2001Publication date: June 19, 2003Inventors: Robert K. Chen, John C. Gammel, Dewayne A. Spires
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Patent number: 6301358Abstract: A dual-supply line-interface circuit (100) uses a −48V power supply (VBAT1) to drive long subscriber loops (120) and uses a −28V power supply (VBAT2) to drive short subscriber loops. For intermediate-length loops, a dual-slope current-feed profile (FIG. 4) is employed to limit the line-circuit's power dissipation. The line-interface circuit operates in an apparent constant-current mode, generating about 40 mA of differential line current using the low power supply, up to a threshold line voltage of about 25V, which is equal to the low power supply voltage minus required overhead. For longer loops, the line-interface circuit switches to a second constant-current mode, generating about 22 mA of differential current using the high power supply, which maintains the loop current constant until it drops to the 48V resistive-feed value.Type: GrantFiled: May 29, 1998Date of Patent: October 9, 2001Assignee: Avaya Technology Corp.Inventors: Robert K. Chen, Dieter J. H. Knollman
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Patent number: 5848149Abstract: A subscriber line circuit which truly implements all of the BORSCHT functions and which does not rely on an external ringing generator to provide the ringing voltage when needed is disclosed. This implementation is achieved by recognizing that supervisory and ringing signals occur in some sort of sequence and, therefore, do not have to be generated simultaneously. Based on this recognition, we provide a circuit which truly implements all of the BORSCHT functions and includes a power section that generates each of the supervisory signals, e.g., -48 volts and -24 volts, and alerting signal, e.g., ringing signal, in turn and as required.Type: GrantFiled: May 26, 1995Date of Patent: December 8, 1998Assignee: Lucent Technologies Inc.Inventors: Robert K. Chen, Paul W. Frazier, John C. Gammel, Andrew J. Marsh, Apurba Roy, Dewayne Alan Spires