Xiaofan Fei

Person

Austin, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Audio processing system signal-level based temporal masking
- Patent number 12,039,964
- Issue date Jul 16, 2024
- Cirrus Logic, Inc.
- Ku He
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
On-chip inductor with audio headphone amplifier
- Patent number 11,798,978
- Issue date Oct 24, 2023
- Cirrus Logic Inc.
- John L. Melanson
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Equalization in a multi-path audio amplifier for canceling variatio...
- Patent number 11,677,360
- Issue date Jun 13, 2023
- Cirrus Logic, Inc.
- Leyi Yin
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Single-inductor multiple output (SIMO) switching power supply havin...
- Patent number 11,552,567
- Issue date Jan 10, 2023
- Cirrus Logic, Inc.
- Xin Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Signal amplitude-selected signal predistortion in an amplifier
- Patent number 11,539,331
- Issue date Dec 27, 2022
- Cirrus Logic, Inc.
- Amar Vellanki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Frequency-selective common-mode control and output stage biasing in...
- Patent number 11,522,509
- Issue date Dec 6, 2022
- Cirrus Logic, Inc.
- Xin Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Dynamic range enhancement (DRE) control in adaptive noise cancellat...
- Patent number 11,423,872
- Issue date Aug 23, 2022
- Cirrus Logic, Inc.
- Ku He
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Tracking and correcting gain of open-loop driver in a multi-path pr...
- Patent number 11,329,620
- Issue date May 10, 2022
- Cirrus Logic, Inc.
- Johann G. Gaboriau
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Current digital-to-analog converter with high-impedance output
- Patent number 11,271,583
- Issue date Mar 8, 2022
- Cirrus Logic, Inc.
- John L. Melanson
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Dual bootstrapping for an open-loop pulse width modulation driver
- Patent number 11,190,168
- Issue date Nov 30, 2021
- Cirrus Logic, Inc.
- Jing Bai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Dual bootstrapping for an open-loop pulse width modulation driver
- Patent number 11,070,203
- Issue date Jul 20, 2021
- Cirrus Logic, Inc.
- Jing Bai
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Using a tracking switched-mode power supply to increase efficiency...
- Patent number 11,050,433
- Issue date Jun 29, 2021
- Cirrus Logic, Inc.
- John L. Melanson
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Current digital-to-analog converter with warming of digital-to-anal...
- Patent number 11,043,959
- Issue date Jun 22, 2021
- Cirrus Logic, Inc.
- John L. Melanson
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Suppression of noise of delta-sigma modulators
- Patent number 10,840,940
- Issue date Nov 17, 2020
- Cirrus Logic, Inc.
- Leyi YiN
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Zero-latency pulse density modulation interface with format detection
- Patent number 10,770,086
- Issue date Sep 8, 2020
- Cirrus Logic, Inc.
- Masoud Farshbaf Zinati
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Gain control in a class-D open-loop amplifier
- Patent number 10,763,811
- Issue date Sep 1, 2020
- Cirrus Logic, Inc.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Increased noise performance using quantizer code suppression
- Patent number 10,727,860
- Issue date Jul 28, 2020
- Cirrus Logic, Inc.
- Wai-Shun Shum
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Polymorphic playback system with signal detection filters of differ...
- Patent number 10,726,873
- Issue date Jul 28, 2020
- Cirrus Logic, Inc.
- Ku He
- G11 - INFORMATION STORAGE
Information Patent Grant
Low-latency audio output with variable group delay
- Patent number 10,701,486
- Issue date Jun 30, 2020
- Cirrus Logic, Inc.
- John L. Melanson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital short detection method of class D amplifier
- Patent number 10,663,531
- Issue date May 26, 2020
- Cirrus Logic, Inc.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Open-loop class-D amplifier system with analog supply ramping
- Patent number 10,658,988
- Issue date May 19, 2020
- Cirrus Logic, Inc.
- Miao Song
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Variable output resistance in a playback path with open-loop pulse-...
- Patent number 10,644,661
- Issue date May 5, 2020
- Cirrus Logic, Inc.
- Tejasvi Das
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Full-scale range enhancement in a dual-path pulse width modulation...
- Patent number 10,594,310
- Issue date Mar 17, 2020
- Cirrus Logic, Inc.
- Ku He
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Cross regulation reduction in single inductor multiple output (SIMO...
- Patent number 10,505,454
- Issue date Dec 10, 2019
- Cirrus Logic, Inc.
- Xin Zhao
- G05 - CONTROLLING REGULATING
Information Patent Grant
Cross-fading in dual-path pulse width modulation system
- Patent number 10,476,444
- Issue date Nov 12, 2019
- Cirrus Logic, Inc.
- Tejasvi Das
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier with configurable final output stage
- Patent number 10,447,217
- Issue date Oct 15, 2019
- Cirrus Logic, Inc.
- Xin Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Headset management by microphone terminal characteristic detection
- Patent number 10,412,479
- Issue date Sep 10, 2019
- Cirrus Logic, Inc.
- Xin Zhao
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Calibration of a dual-path pulse width modulation system
- Patent number 10,404,248
- Issue date Sep 3, 2019
- Cirrus Logic, Inc.
- Tejasvi Das
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Fully-differential operational amplifier system
- Patent number 10,320,337
- Issue date Jun 11, 2019
- Cirrus Logic, Inc.
- Xin Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Switching in an audio system with multiple playback paths
- Patent number 10,321,230
- Issue date Jun 11, 2019
- Cirrus Logic, Inc.
- Tejasvi Das
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
SYSTEMS AND METHODS FOR RELAYING A MESSAGE FOR A PHYSICAL LEVEL/DAT...
- Publication number 20230379592
- Publication date Nov 23, 2023
- Cirrus Logic International Semiconductor Ltd.
- Wai-Shun SHUM
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SINGLE-INDUCTOR MULTIPLE OUTPUT (SIMO) SWITCHING POWER SUPPLY HAVIN...
- Publication number 20220329155
- Publication date Oct 13, 2022
- Cirrus Logic International Semiconductor Ltd.
- Xin Zhao
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
SIGNAL AMPLITUDE-SELECTED SIGNAL PREDISTORTION IN AN AMPLIFIER
- Publication number 20220329212
- Publication date Oct 13, 2022
- Cirrus Logic International Semiconductor Ltd.
- Amar Vellanki
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
EQUALIZATION IN A MULTI-PATH AUDIO AMPLIFIER FOR CANCELING VARIATIO...
- Publication number 20220329216
- Publication date Oct 13, 2022
- Cirrus Logic International Semiconductor Ltd.
- Leyi Yin
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AUDIO PROCESSING SYTEM SIGNAL-LEVEL BASED TEMPORAL MASKING
- Publication number 20220284877
- Publication date Sep 8, 2022
- Cirrus Logic International Semiconductor Ltd.
- Ku He
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
FREQUENCY-SELECTIVE COMMON-MODE CONTROL AND OUTPUT STAGE BIASING IN...
- Publication number 20220286098
- Publication date Sep 8, 2022
- Cirrus Logic International Semiconductor Ltd.
- Xin Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CURRENT DIGITAL-TO-ANALOG CONVERTER WITH HIGH-IMPEDANCE OUTPUT
- Publication number 20210175895
- Publication date Jun 10, 2021
- Cirrus Logic International Semiconductor Ltd.
- John L. MELANSON
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
USING A TRACKING SWITCHED-MODE POWER SUPPLY TO INCREASE EFFICIENCY...
- Publication number 20210175896
- Publication date Jun 10, 2021
- John L. MELANSON
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CURRENT DIGITAL-TO-ANALOG CONVERTER WITH WARMING OF DIGITAL-TO-ANAL...
- Publication number 20210175894
- Publication date Jun 10, 2021
- Cirrus Logic International Semiconductor Ltd.
- John L. MELANSON
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
ON-CHIP INDUCTOR WITH AUDIO HEADPHONE AMPLIFIER
- Publication number 20210175322
- Publication date Jun 10, 2021
- Cirrus Logic International Semiconductor Ltd.
- John L. MELANSON
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
TRACKING AND CORRECTING GAIN OF OPEN-LOOP DRIVER IN A MULTI-PATH PR...
- Publication number 20200343871
- Publication date Oct 29, 2020
- Cirrus Logic International Semiconductor Ltd.
- Johann G. GABORIAU
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SUPPRESSION OF NOISE OF DELTA-SIGMA MODULATORS
- Publication number 20200204193
- Publication date Jun 25, 2020
- Cirrus Logic International Semiconductor Ltd.
- Leyi YIN
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DUAL BOOTSTRAPPING FOR AN OPEN-LOOP PULSE WIDTH MODULATION DRIVER
- Publication number 20200177167
- Publication date Jun 4, 2020
- Cirrus Logic International Semiconductor Ltd.
- Jing BAI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
POLYMORPHIC PLAYBACK SYSTEM WITH SIGNAL DETECTION FILTERS OF DIFFER...
- Publication number 20200058326
- Publication date Feb 20, 2020
- Cirrus Logic International Semiconductor Ltd.
- Ku He
- G11 - INFORMATION STORAGE
Information Patent Application
VARIABLE OUTPUT RESISTANCE IN A PLAYBACK PATH WITH OPEN-LOOP PULSE-...
- Publication number 20200044616
- Publication date Feb 6, 2020
- Cirrus Logic International Semiconductor Ltd.
- Tejasvi DAS
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
GAIN CONTROL IN A CLASS-D OPEN-LOOP AMPLIFIER
- Publication number 20200036352
- Publication date Jan 30, 2020
- Cirrus Logic International Semiconductor Ltd.
- Lei ZHU
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
FULL-SCALE RANGE ENHANCEMENT IN A DUAL-PATH PULSE WIDTH MODULATION...
- Publication number 20190260365
- Publication date Aug 22, 2019
- Cirrus Logic International Semiconductor Ltd.
- Ku HE
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DUAL BOOTSTRAPPING FOR AN OPEN-LOOP PULSE WIDTH MODULATION DRIVER
- Publication number 20190260377
- Publication date Aug 22, 2019
- Cirrus Logic International Semiconductor Ltd.
- Jing BAI
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
ZERO-LATENCY PULSE DENSITY MODULATION INTERFACE WITH FORMAT DETECTION
- Publication number 20190259402
- Publication date Aug 22, 2019
- Cirrus Logic International Semiconductor Ltd.
- Masoud FARSHBAF ZINATI
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CROSS REGULATION REDUCTION IN SINGLE INDUCTOR MULTIPLE OUTPUT (SIMO...
- Publication number 20190199215
- Publication date Jun 27, 2019
- Cirrus Logic International Semiconductor Ltd.
- Xin Zhao
- G05 - CONTROLLING REGULATING
Information Patent Application
CALIBRATION OF A DUAL-PATH PULSE WIDTH MODULATION SYSTEM
- Publication number 20190115886
- Publication date Apr 18, 2019
- Cirrus Logic International Semiconductor Ltd.
- Tejasvi DAS
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CALIBRATION OF A DUAL-PATH PULSE WIDTH MODULATION SYSTEM
- Publication number 20190115909
- Publication date Apr 18, 2019
- Cirrus Logic International Semiconductor Ltd.
- Tejasvi DAS
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
DIGITAL SHORT DETECTION METHOD OF CLASS D AMPLIFIER
- Publication number 20190107570
- Publication date Apr 11, 2019
- Cirrus Logic International Semiconductor Ltd.
- LEI ZHU
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SWITCHING IN AN AUDIO SYSTEM WITH MULTIPLE PLAYBACK PATHS
- Publication number 20180295442
- Publication date Oct 11, 2018
- Cirrus Logic International Semiconductor Ltd.
- Tejasvi DAS
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AMPLIFIER WITH CONFIGURABLE FINAL OUTPUT STAGE
- Publication number 20180159488
- Publication date Jun 7, 2018
- Cirrus Logic International Semiconductor Ltd.
- Xin ZHAO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AMPLIFIER WITH CONFIGURABLE FINAL OUTPUT STAGE
- Publication number 20180091102
- Publication date Mar 29, 2018
- Cirrus Logic International Semiconductor Ltd.
- Xin ZHAO
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
FULLY-DIFFERENTIAL OPERATIONAL AMPLIFIER SYSTEM
- Publication number 20180062583
- Publication date Mar 1, 2018
- Cirrus Logic International Semiconductor Ltd.
- Xin Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
HEADSET MANAGEMENT BY MICROPHONE TERMINAL CHARACTERISTIC DETECTION
- Publication number 20170019725
- Publication date Jan 19, 2017
- Cirrus Logic International Semiconductor Ltd.
- Xin Zhao
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SYSTEMS AND METHODS FOR GAIN CALIBRATION OF AN AUDIO SIGNAL PATH
- Publication number 20160072465
- Publication date Mar 10, 2016
- Cirrus Logic, Inc.
- Tejasvi Das
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
COMPARATOR TRACKING CONTROL SCHEME WITH DYNAMIC WINDOW LENGTH
- Publication number 20150303932
- Publication date Oct 22, 2015
- Cirrus Logic, Inc.
- Ku He
- H03 - BASIC ELECTRONIC CIRCUITRY

Xiaofan Fei

Person

Patents Grantslast 30 patents

Audio processing system signal-level based temporal masking

On-chip inductor with audio headphone amplifier

Equalization in a multi-path audio amplifier for canceling variatio...

Single-inductor multiple output (SIMO) switching power supply havin...

Signal amplitude-selected signal predistortion in an amplifier

Frequency-selective common-mode control and output stage biasing in...

Dynamic range enhancement (DRE) control in adaptive noise cancellat...

Tracking and correcting gain of open-loop driver in a multi-path pr...

Current digital-to-analog converter with high-impedance output

Dual bootstrapping for an open-loop pulse width modulation driver

Dual bootstrapping for an open-loop pulse width modulation driver

Using a tracking switched-mode power supply to increase efficiency...

Current digital-to-analog converter with warming of digital-to-anal...

Suppression of noise of delta-sigma modulators

Zero-latency pulse density modulation interface with format detection

Gain control in a class-D open-loop amplifier

Increased noise performance using quantizer code suppression

Polymorphic playback system with signal detection filters of differ...

Low-latency audio output with variable group delay

Digital short detection method of class D amplifier

Open-loop class-D amplifier system with analog supply ramping

Variable output resistance in a playback path with open-loop pulse-...

Full-scale range enhancement in a dual-path pulse width modulation...

Cross regulation reduction in single inductor multiple output (SIMO...

Cross-fading in dual-path pulse width modulation system

Amplifier with configurable final output stage

Headset management by microphone terminal characteristic detection

Calibration of a dual-path pulse width modulation system

Fully-differential operational amplifier system

Switching in an audio system with multiple playback paths

Patents Applicationslast 30 patents

SYSTEMS AND METHODS FOR RELAYING A MESSAGE FOR A PHYSICAL LEVEL/DAT...

SINGLE-INDUCTOR MULTIPLE OUTPUT (SIMO) SWITCHING POWER SUPPLY HAVIN...

SIGNAL AMPLITUDE-SELECTED SIGNAL PREDISTORTION IN AN AMPLIFIER

EQUALIZATION IN A MULTI-PATH AUDIO AMPLIFIER FOR CANCELING VARIATIO...

AUDIO PROCESSING SYTEM SIGNAL-LEVEL BASED TEMPORAL MASKING

FREQUENCY-SELECTIVE COMMON-MODE CONTROL AND OUTPUT STAGE BIASING IN...

CURRENT DIGITAL-TO-ANALOG CONVERTER WITH HIGH-IMPEDANCE OUTPUT

USING A TRACKING SWITCHED-MODE POWER SUPPLY TO INCREASE EFFICIENCY...

CURRENT DIGITAL-TO-ANALOG CONVERTER WITH WARMING OF DIGITAL-TO-ANAL...

ON-CHIP INDUCTOR WITH AUDIO HEADPHONE AMPLIFIER

TRACKING AND CORRECTING GAIN OF OPEN-LOOP DRIVER IN A MULTI-PATH PR...

SUPPRESSION OF NOISE OF DELTA-SIGMA MODULATORS

DUAL BOOTSTRAPPING FOR AN OPEN-LOOP PULSE WIDTH MODULATION DRIVER

POLYMORPHIC PLAYBACK SYSTEM WITH SIGNAL DETECTION FILTERS OF DIFFER...

VARIABLE OUTPUT RESISTANCE IN A PLAYBACK PATH WITH OPEN-LOOP PULSE-...

GAIN CONTROL IN A CLASS-D OPEN-LOOP AMPLIFIER

FULL-SCALE RANGE ENHANCEMENT IN A DUAL-PATH PULSE WIDTH MODULATION...

DUAL BOOTSTRAPPING FOR AN OPEN-LOOP PULSE WIDTH MODULATION DRIVER

ZERO-LATENCY PULSE DENSITY MODULATION INTERFACE WITH FORMAT DETECTION

CROSS REGULATION REDUCTION IN SINGLE INDUCTOR MULTIPLE OUTPUT (SIMO...

CALIBRATION OF A DUAL-PATH PULSE WIDTH MODULATION SYSTEM

CALIBRATION OF A DUAL-PATH PULSE WIDTH MODULATION SYSTEM

DIGITAL SHORT DETECTION METHOD OF CLASS D AMPLIFIER

SWITCHING IN AN AUDIO SYSTEM WITH MULTIPLE PLAYBACK PATHS

AMPLIFIER WITH CONFIGURABLE FINAL OUTPUT STAGE

AMPLIFIER WITH CONFIGURABLE FINAL OUTPUT STAGE

FULLY-DIFFERENTIAL OPERATIONAL AMPLIFIER SYSTEM

HEADSET MANAGEMENT BY MICROPHONE TERMINAL CHARACTERISTIC DETECTION

SYSTEMS AND METHODS FOR GAIN CALIBRATION OF AN AUDIO SIGNAL PATH

COMPARATOR TRACKING CONTROL SCHEME WITH DYNAMIC WINDOW LENGTH