Fei; Xiaofan

Patent Applications and Registrations

Patent applications and USPTO patent grants for Fei; Xiaofan.The latest application filed is for "frequency-selective common-mode control and output stage biasing in an operational amplifier for a class-d amplifier loop filter".

Company Profile

14.46.31

Fei; Xiaofan - Austin TX
Fei; Xiaofan - Bellevue WA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Frequency-selective Common-mode Control And Output Stage Biasing In An Operational Amplifier For A Class-d Amplifier Loop Filter App 20220286098 - Zhao; Xin ; et al.	2022-09-08
Audio Processing Sytem Signal-level Based Temporal Masking App 20220284877 - He; Ku ; et al.	2022-09-08
Dynamic range enhancement (DRE) control in adaptive noise cancellation (ANC) applications Grant 11,423,872 - He , et al. August 23, 2	2022-08-23
Tracking and correcting gain of open-loop driver in a multi-path processing system Grant 11,329,620 - Gaboriau , et al. May 10, 2	2022-05-10
Current digital-to-analog converter with high-impedance output Grant 11,271,583 - Melanson , et al. March 8, 2	2022-03-08
Dual bootstrapping for an open-loop pulse width modulation driver Grant 11,190,168 - Bai , et al. November 30, 2	2021-11-30
Distributed Electric Propulsion Modular Wing Aircraft with Blown Wing and Extreme Flaps for VTOL and/or STOL Flight App 20210331791 - Geuther; Steven C. ; et al.	2021-10-28
Dual bootstrapping for an open-loop pulse width modulation driver Grant 11,070,203 - Bai , et al. July 20, 2	2021-07-20
Using a tracking switched-mode power supply to increase efficiency of a current digital-to-analog converter-based output stage Grant 11,050,433 - Melanson , et al. June 29, 2	2021-06-29
Current digital-to-analog converter with warming of digital-to-analog converter elements Grant 11,043,959 - Melanson , et al. June 22, 2	2021-06-22
Current Digital-to-analog Converter With Warming Of Digital-to-analog Converter Elements App 20210175894 - MELANSON; John L. ; et al.	2021-06-10
Using A Tracking Switched-mode Power Supply To Increase Efficiency Of A Current Digital-to-analog Converter-based Output Stage App 20210175896 - MELANSON; John L. ; et al.	2021-06-10
Current Digital-to-analog Converter With High-impedance Output App 20210175895 - MELANSON; John L. ; et al.	2021-06-10
On-chip Inductor With Audio Headphone Amplifier App 20210175322 - MELANSON; John L. ; et al.	2021-06-10
Suppression of noise of delta-sigma modulators Grant 10,840,940 - YiN , et al. November 17, 2	2020-11-17
Tracking And Correcting Gain Of Open-loop Driver In A Multi-path Processing System App 20200343871 - GABORIAU; Johann G. ; et al.	2020-10-29
Zero-latency pulse density modulation interface with format detection Grant 10,770,086 - Farshbaf Zinati , et al. Sep	2020-09-08
Gain control in a class-D open-loop amplifier Grant 10,763,811 - Zhu , et al. Sep	2020-09-01
Polymorphic playback system with signal detection filters of different latencies Grant 10,726,873 - He , et al.	2020-07-28
Increased noise performance using quantizer code suppression Grant 10,727,860 - Shum , et al.	2020-07-28
Low-latency audio output with variable group delay Grant 10,701,486 - Melanson , et al.	2020-06-30
Suppression Of Noise Of Delta-sigma Modulators App 20200204193 - YIN; Leyi ; et al.	2020-06-25
Dual Bootstrapping For An Open-loop Pulse Width Modulation Driver App 20200177167 - BAI; Jing ; et al.	2020-06-04
Digital short detection method of class D amplifier Grant 10,663,531 - Zhu , et al.	2020-05-26
Variable output resistance in a playback path with open-loop pulse-width modulation driver Grant 10,644,661 - Das , et al.	2020-05-05
Full-scale range enhancement in a dual-path pulse width modulation playback system Grant 10,594,310 - He , et al.	2020-03-17
Polymorphic Playback System With Signal Detection Filters Of Different Latencies App 20200058326 - He; Ku ; et al.	2020-02-20
Variable Output Resistance In A Playback Path With Open-loop Pulse-width Modulation Driver App 20200044616 - DAS; Tejasvi ; et al.	2020-02-06
Gain Control In A Class-d Open-loop Amplifier App 20200036352 - ZHU; Lei ; et al.	2020-01-30
Cross regulation reduction in single inductor multiple output (SIMO) switching DC-DC converters Grant 10,505,454 - Zhao , et al. Dec	2019-12-10
Cross-fading in dual-path pulse width modulation system Grant 10,476,444 - Das , et al. Nov	2019-11-12
Amplifier with configurable final output stage Grant 10,447,217 - Zhao , et al. Oc	2019-10-15
Headset management by microphone terminal characteristic detection Grant 10,412,479 - Zhao , et al. Sept	2019-09-10
Calibration of a dual-path pulse width modulation system Grant 10,404,248 - Das , et al. Sep	2019-09-03
Zero-latency Pulse Density Modulation Interface With Format Detection App 20190259402 - FARSHBAF ZINATI; Masoud ; et al.	2019-08-22
Dual Bootstrapping For An Open-loop Pulse Width Modulation Driver App 20190260377 - BAI; Jing ; et al.	2019-08-22
Full-scale Range Enhancement In A Dual-path Pulse Width Modulation Playback System App 20190260365 - HE; Ku ; et al.	2019-08-22
Cross Regulation Reduction In Single Inductor Multiple Output (simo) Switching Dc-dc Converters App 20190199215 - Zhao; Xin ; et al.	2019-06-27
Fully-differential operational amplifier system Grant 10,320,337 - Zhao , et al.	2019-06-11
Switching in an audio system with multiple playback paths Grant 10,321,230 - Das , et al.	2019-06-11
Calibration Of A Dual-path Pulse Width Modulation System App 20190115886 - DAS; Tejasvi ; et al.	2019-04-18
Calibration Of A Dual-path Pulse Width Modulation System App 20190115909 - DAS; Tejasvi ; et al.	2019-04-18
Calibration of a dual-path pulse width modulation system Grant 10,263,584 - Das , et al.	2019-04-16
Digital Short Detection Method Of Class D Amplifier App 20190107570 - ZHU; LEI ; et al.	2019-04-11
Calibration of a dual-path pulse width modulation system Grant 10,181,845 - Das , et al. Ja	2019-01-15
Switching In An Audio System With Multiple Playback Paths App 20180295442 - DAS; Tejasvi ; et al.	2018-10-11
Switching in amplifier with configurable final output stage Grant 10,008,992 - Zhu , et al. June 26, 2	2018-06-26
Amplifier With Configurable Final Output Stage App 20180159488 - ZHAO; Xin ; et al.	2018-06-07
Amplifier With Configurable Final Output Stage App 20180091102 - ZHAO; Xin ; et al.	2018-03-29
Amplifier with configurable final output stage Grant 9,929,703 - Zhao , et al. March 27, 2	2018-03-27
Calibration for amplifier with configurable final output stage Grant 9,917,557 - Zhu , et al. March 13, 2	2018-03-13
Fully-differential Operational Amplifier System App 20180062583 - Zhao; Xin ; et al.	2018-03-01
Systems and methods for measuring inductor current in a switching DC-to-DC converter Grant 9,853,539 - Zhao , et al. December 26, 2	2017-12-26
Opportunistic playback state changes for audio devices Grant 9,831,843 - Das , et al. November 28, 2	2017-11-28
Switchable secondary playback path Grant 9,680,488 - Das , et al. June 13, 2	2017-06-13
Headset Management By Microphone Terminal Characteristic Detection App 20170019725 - Zhao; Xin ; et al.	2017-01-19
Systems and methods for measuring inductor current in a switching DC-to-DC converter Grant 9,461,537 - Zhao , et al. October 4, 2	2016-10-04
Systems and methods for gain calibration of an audio signal path Grant 9,337,795 - Das , et al. May 10, 2	2016-05-10
Switchable secondary playback path Grant 9,306,588 - Das , et al. April 5, 2	2016-04-05
Systems and methods for minimizing distortion in an audio output stage Grant 9,301,046 - Das , et al. March 29, 2	2016-03-29
Systems And Methods For Gain Calibration Of An Audio Signal Path App 20160072465 - Das; Tejasvi ; et al.	2016-03-10
Comparator tracking control scheme with dynamic window length Grant 9,214,948 - He , et al. December 15, 2	2015-12-15
Comparator Tracking Control Scheme With Dynamic Window Length App 20150303932 - He; Ku ; et al.	2015-10-22
Switchable Secondary Playback Path App 20150295584 - Das; Tejasvi ; et al.	2015-10-15
Thermal feedback for switch mode amplification Grant 8,447,050 - Melanson , et al. May 21, 2	2013-05-21
Thermal Feedback for Switch Mode Amplification App 20110075723 - Melanson; John L. ; et al.	2011-03-31
Thermal feedback for switch mode amplification Grant 7,840,015 - Melanson , et al. November 23, 2	2010-11-23
Non-integer interpolation using cascaded integrator-comb filter Grant 7,324,025 - Ding , et al. January 29, 2	2008-01-29
Automatic mode detection circuits for configuring a terminal as an output terminal in a first mode as an input terminal in a second mode Grant 7,055,045 - Gaboriau , et al. May 30, 2	2006-05-30
Signal processing system having an ADC delta-sigma modulator with single-ended input and feedback signal inputs Grant 6,972,705 - Fei , et al. December 6, 2	2005-12-06
Feedback steering delta-sigma modulators and systems using the same Grant 6,933,871 - Melanson , et al. August 23, 2	2005-08-23
Feedback steering delta-sigma modulators and systems using the same App 20050116849 - Melanson, John Laurence ; et al.	2005-06-02
Power supply based audio compression for digital audio amplifier Grant 6,853,242 - Melanson , et al. February 8, 2	2005-02-08
Power supply based audio compression for digital audio amplifier App 20040222846 - Melanson, John L. ; et al.	2004-11-11
Power supply based audio compression for digital audio amplifier Grant 6,765,436 - Melanson , et al. July 20, 2	2004-07-20
Transient noise reduction circuits, systems and methods in power digital-to-analog converters Grant 6,538,590 - Gaboriau , et al. March 25, 2	2003-03-25

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