Inventor · disambiguated record
Xiaofan Fei
Also filed as: FEI XIAOFAN · FEI XIAOFAN FRANKY
56 granted patents·1 pending application·554 citations·filing 2001–2023
98Inventor score
Top patents by PatentIndex Score
57 records- 0198US11050433B1Using a tracking switched-mode power supply to increase efficiency of a current digital-to-analog converter-based output stageCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2020·Granted Jun 29, 2021·24 cites·30 claims
- 0297US9306588B2Switchable secondary playback pathCIRRUS LOGIC INC·Filed 2015·Granted Apr 5, 2016·25 cites·30 claims
- 0396US10447217B2Amplifier with configurable final output stageCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Oct 15, 2019·20 cites·50 claims
- 0494US11043959B1Current digital-to-analog converter with warming of digital-to-analog converter elementsCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2020·Granted Jun 22, 2021·4 cites·26 claims
- 0594US9917557B1Calibration for amplifier with configurable final output stageCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2017·Granted Mar 13, 2018·14 cites·14 claims
- 0693US9337795B2Systems and methods for gain calibration of an audio signal pathCIRRUS LOGIC INC·Filed 2014·Granted May 10, 2016·28 cites·24 claims
- 0793US6853242B2Power supply based audio compression for digital audio amplifierCIRRUS LOGIC INC·Filed 2004·Granted Feb 8, 2005·51 cites·16 claims
- 0892US9831843B1Opportunistic playback state changes for audio devicesCIRRUS LOGIC INC·Filed 2014·Granted Nov 28, 2017·17 cites·47 claims
- 0992US9680488B2Switchable secondary playback pathCIRRUS LOGIC INC·Filed 2016·Granted Jun 13, 2017·10 cites·22 claims
- 1091US9929703B1Amplifier with configurable final output stageCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2016·Granted Mar 27, 2018·9 cites·30 claims
- 1191US6972705B1Signal processing system having an ADC delta-sigma modulator with single-ended input and feedback signal inputsCIRRUS LOGIC INC·Filed 2004·Granted Dec 6, 2005·47 cites·30 claims
- 1290US11677360B2Equalization in a multi-path audio amplifier for canceling variations due to multi-path output impedance differencesCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2021·Granted Jun 13, 2023·2 cites·20 claims
- 1390US10505454B2Cross regulation reduction in single inductor multiple output (SIMO) switching DC-DC convertersCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Dec 10, 2019·7 cites·20 claims
- 1490US10181845B1Calibration of a dual-path pulse width modulation systemCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Jan 15, 2019·6 cites·47 claims
- 1589US9301046B1Systems and methods for minimizing distortion in an audio output stageCIRRUS LOGIC INC·Filed 2013·Granted Mar 29, 2016·14 cites·21 claims
- 1689US7324025B1Non-integer interpolation using cascaded integrator-comb filterCIRRUS LOGIC INC·Filed 2006·Granted Jan 29, 2008·19 cites·12 claims
- 1789US6556159B1Variable order modulatorCIRRUS LOGIC INC·Filed 2001·Granted Apr 29, 2003·41 cites·23 claims
- 1888US6765436B1Power supply based audio compression for digital audio amplifierCIRRUS LOGIC INC·Filed 2002·Granted Jul 20, 2004·37 cites·27 claims
- 1987US6933871B2Feedback steering delta-sigma modulators and systems using the sameCIRRUS LOGIC INC·Filed 2003·Granted Aug 23, 2005·36 cites·22 claims
- 2086US10658988B1Open-loop class-D amplifier system with analog supply rampingCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted May 19, 2020·5 cites·24 claims
- 2184US11423872B1Dynamic range enhancement (DRE) control in adaptive noise cancellation (ANC) applicationsCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2021·Granted Aug 23, 2022·1 cites·26 claims
- 2282US6538590B1Transient noise reduction circuits, systems and methods in power digital-to-analog convertersCIRRUS LOGIC INC·Filed 2001·Granted Mar 25, 2003·28 cites·35 claims
- 2381US10840940B2Suppression of noise of delta-sigma modulatorsCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2019·Granted Nov 17, 2020·4 cites·20 claims
- 2480US10412479B2Headset management by microphone terminal characteristic detectionCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2016·Granted Sep 10, 2019·4 cites·20 claims
- 2580US6522278B1Digital-to-analog converter with power up/down transient suppression and automatic rate switchingCIRRUS LOGIC INC·Filed 2002·Granted Feb 18, 2003·26 cites·17 claims
- 2679US11271583B2Current digital-to-analog converter with high-impedance outputCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2020·Granted Mar 8, 2022·1 cites·18 claims
- 2779US10763811B2Gain control in a class-D open-loop amplifierCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Sep 1, 2020·3 cites·20 claims
- 2879US10701486B1Low-latency audio output with variable group delayCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2019·Granted Jun 30, 2020·2 cites·14 claims
- 2979US10663531B2Digital short detection method of class D amplifierCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted May 26, 2020·3 cites·20 claims
- 3078US7840015B1Thermal feedback for switch mode amplificationCIRRUS LOGIC INC·Filed 2002·Granted Nov 23, 2010·21 cites·19 claims
- 3176US9461537B1Systems and methods for measuring inductor current in a switching DC-to-DC converterCIRRUS LOGIC INC·Filed 2014·Granted Oct 4, 2016·3 cites·26 claims
- 3274US10476444B1Cross-fading in dual-path pulse width modulation systemCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Nov 12, 2019·2 cites·20 claims
- 3374US10320337B2Fully-differential operational amplifier systemCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2017·Granted Jun 11, 2019·3 cites·29 claims
- 3472US10726873B2Polymorphic playback system with signal detection filters of different latenciesCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Jul 28, 2020·2 cites·14 claims
- 3572US10008992B1Switching in amplifier with configurable final output stageCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2017·Granted Jun 26, 2018·2 cites·28 claims
- 3664US11070203B2Dual bootstrapping for an open-loop pulse width modulation driverCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Jul 20, 2021·1 cites·10 claims
- 3764US10727860B1Increased noise performance using quantizer code suppressionCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2019·Granted Jul 28, 2020·1 cites·12 claims
- 3863US6462690B1Circuit systems and methods for multirate digital-to-analog amplifier systemsCIRRUS LOGIC INC·Filed 2001·Granted Oct 8, 2002·14 cites·18 claims
- 3961US11539331B2Signal amplitude-selected signal predistortion in an amplifierCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2021·Granted Dec 27, 2022·0 cites·31 claims
- 4061US6522273B1Circuits systems and methods for power digital-to-analog converter protectionCIRRUS LOGIC INC·Filed 2001·Granted Feb 18, 2003·11 cites·21 claims
- 4160US11522509B2Frequency-selective common-mode control and output stage biasing in an operational amplifier for a class-D amplifier loop filterCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2021·Granted Dec 6, 2022·0 cites·21 claims
- 4258US7055045B1Automatic mode detection circuits for configuring a terminal as an output terminal in a first mode as an input terminal in a second modeCIRRUS LOGIC INC·Filed 2002·Granted May 30, 2006·6 cites·20 claims
- 4357US11552567B2Single-inductor multiple output (SIMO) switching power supply having offset common-mode voltage for operating a class-d audio amplifierCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2021·Granted Jan 10, 2023·0 cites·28 claims
- 4457US10404248B2Calibration of a dual-path pulse width modulation systemCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Sep 3, 2019·0 cites·17 claims
- 4556US11798978B2On-chip inductor with audio headphone amplifierCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2020·Granted Oct 24, 2023·0 cites·16 claims
- 4656US11329620B2Tracking and correcting gain of open-loop driver in a multi-path processing systemCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2020·Granted May 10, 2022·0 cites·14 claims
- 4752US10263584B1Calibration of a dual-path pulse width modulation systemCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2018·Granted Apr 16, 2019·0 cites·29 claims
- 4848US2023379592A1Systems and methods for relaying a message for a physical level/data link level communication protocolCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2023·Application pending·0 cites
- 4947US12039964B2Audio processing system signal-level based temporal maskingCIRRUS LOGIC INT SEMICONDUCTOR LTD·Filed 2021·Granted Jul 16, 2024·0 cites·20 claims
- 5045US9853539B1Systems and methods for measuring inductor current in a switching DC-to-DC converterCIRRUS LOGIC INC·Filed 2014·Granted Dec 26, 2017·0 cites·37 claims
Showing the top 50 of 57 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →