Inventor

FEI XIAOFAN

US70 patents

⚠️ This page may combine multiple inventors who share the name “FEI XIAOFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FEI XIAOFAN

CIRRUS LOGIC INT SEMICONDUCTOR LTD

Amplifier with configurable final output stage

Using a tracking switched-mode power supply to increase efficiency of a current digital-to-analog converter-based output stage

Cross regulation reduction in single inductor multiple output (SIMO) switching DC-DC converters

Calibration of a dual-path pulse width modulation system

Amplifier with configurable final output stage

Calibration for amplifier with configurable final output stage

Polymorphic playback system with signal detection filters of different latencies

Digital short detection method of class D amplifier

Cross-fading in dual-path pulse width modulation system

Switching in amplifier with configurable final output stage

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

Current digital-to-analog converter with warming of digital-to-analog converter elements

Suppression of noise of delta-sigma modulators

Equalization in a multi-path audio amplifier for canceling variations due to multi-path output impedance differences

Gain control in a class-D open-loop amplifier

Low-latency audio output with variable group delay

Headset management by microphone terminal characteristic detection

Fully-differential operational amplifier system

Frequency-selective common-mode control and output stage biasing in an operational amplifier for a class-D amplifier loop filter

On-chip inductor with audio headphone amplifier

Dynamic range enhancement (DRE) control in adaptive noise cancellation (ANC) applications

Dual bootstrapping for an open-loop pulse width modulation driver

Increased noise performance using quantizer code suppression

Signal amplitude-selected signal predistortion in an amplifier

CIRRUS LOGIC INC

Power supply based audio compression for digital audio amplifier

Switchable secondary playback path

Systems and methods for gain calibration of an audio signal path

Thermal feedback for switch mode amplification

Signal processing system having an ADC delta-sigma modulator with single-ended input and feedback signal inputs

Feedback steering delta-sigma modulators and systems using the same

Power supply based audio compression for digital audio amplifier

Variable order modulator

Transient noise reduction circuits, systems and methods in power digital-to-analog converters

Digital-to-analog converter with power up/down transient suppression and automatic rate switching

Switchable secondary playback path

Systems and methods for minimizing distortion in an audio output stage

Non-integer interpolation using cascaded integrator-comb filter

Digital non-integer sample/hold implemented using virtual filtering

Opportunistic playback state changes for audio devices

Circuit systems and methods for multirate digital-to-analog amplifier systems

Systems and methods for measuring inductor current in a switching DC-to-DC converter

Circuits systems and methods for power digital-to-analog converter protection

Automatic mode detection circuits for configuring a terminal as an output terminal in a first mode as an input terminal in a second mode

WHISPER AERO INC

Propulsor fan array

Propulsor fan and drive system

Propulsor fan array

Drone

Drone

Drone

Jet