Lei Zhu

Person

Austin, TX, US

People

Patents Grantslast 30 patents

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
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
Control of switches in a variable impedance element
- Patent number 10,812,074
- Issue date Oct 20, 2020
- Cirrus Logic, Inc.
- Yongjie Cheng
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier offset cancellation using amplifier supply voltage
- Patent number 10,797,651
- Issue date Oct 6, 2020
- Cirrus Logic, Inc.
- Graeme Gordon MacKay
- H03 - BASIC ELECTRONIC CIRCUITRY
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
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
Closed-loop digital compensation scheme
- Patent number 10,651,801
- Issue date May 12, 2020
- Cirrus Logic, Inc.
- Lei Zhu
- 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
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
Control of switches in a variable impedance element
- Patent number 10,476,502
- Issue date Nov 12, 2019
- Cirrus Logic, Inc.
- Yongjie Cheng
- H03 - BASIC ELECTRONIC CIRCUITRY
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
Calibration of a dual-path pulse width modulation system
- Patent number 10,263,584
- Issue date Apr 16, 2019
- Cirrus Logic, Inc.
- Tejasvi Das
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Offset calibration for amplifier and preceding circuit
- Patent number 10,236,827
- Issue date Mar 19, 2019
- Cirrus Logic, Inc.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Closed-loop digital compensation scheme
- Patent number 10,224,877
- Issue date Mar 5, 2019
- Cirrus Logic, Inc.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Calibration of a dual-path pulse width modulation system
- Patent number 10,181,845
- Issue date Jan 15, 2019
- Cirrus Logic, Inc.
- Tejasvi Das
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Amplifier offset cancellation using amplifier supply voltage
- Patent number 10,164,576
- Issue date Dec 25, 2018
- Cirrus Logic, Inc.
- Graeme Gordon MacKay
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Digital PWM modulator
- Patent number 10,164,590
- Issue date Dec 25, 2018
- Cirrus Logic, Inc.
- Lingli Zhang
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Switching in amplifier with configurable final output stage
- Patent number 10,008,992
- Issue date Jun 26, 2018
- Cirrus Logic, Inc.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Calibration for amplifier with configurable final output stage
- Patent number 9,917,557
- Issue date Mar 13, 2018
- Cirrus Logic, Inc.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multi-bit pulsed latch cell for use in an integrated circuit
- Patent number 9,633,156
- Issue date Apr 25, 2017
- Cirrus Logic, Inc.
- Bhoodev Kumar
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Multi-bit pulsed latch cell for use in an integrated circuit
- Patent number 9,300,275
- Issue date Mar 29, 2016
- Cirrus Logic, Inc.
- Bhoodev Kumar
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Determining enantiomeric excess using indicator-displacement assays
- Patent number 7,670,847
- Issue date Mar 2, 2010
- Board of Regents, The University of Texas System
- Eric V. Anslyn
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

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
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
AMPLIFIER OFFSET CANCELLATION USING AMPLIFIER SUPPLY VOLTAGE
- Publication number 20200059200
- Publication date Feb 20, 2020
- Cirrus Logic International Semiconductor Ltd.
- Graeme Gordon MACKAY
- H03 - BASIC ELECTRONIC CIRCUITRY
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
CONTROL OF SWITCHES IN A VARIABLE IMPEDANCE ELEMENT
- Publication number 20200021289
- Publication date Jan 16, 2020
- Cirrus Logic International Semiconductor Ltd.
- Yongjie CHENG
- 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
CLOSED-LOOP DIGITAL COMPENSATION SCHEME
- Publication number 20190149096
- Publication date May 16, 2019
- Cirrus Logic International Semiconductor Ltd.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
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
AMPLIFIER OFFSET CANCELLATION USING AMPLIFIER SUPPLY VOLTAGE
- Publication number 20180316313
- Publication date Nov 1, 2018
- Cirrus Logic International Semiconductor Ltd.
- Graeme Gordon MACKAY
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CONTROL OF SWITCHES IN A VARIABLE IMPEDANCE ELEMENT
- Publication number 20180316349
- Publication date Nov 1, 2018
- Cirrus Logic International Semiconductor Ltd.
- Yongjie CHENG
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DIGITAL PWM MODULATOR
- Publication number 20180254757
- Publication date Sep 6, 2018
- Cirrus Logic International Semiconductor Ltd.
- Lingli Zhang
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CLOSED-LOOP DIGITAL COMPENSATION SCHEME
- Publication number 20180212570
- Publication date Jul 26, 2018
- Cirrus Logic International Semiconductor Ltd.
- Lei Zhu
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OFFSET CALIBRATION FOR AMPLIFIER AND PRECEDING CIRCUIT
- Publication number 20180212569
- Publication date Jul 26, 2018
- Cirrus Logic International Semiconductor Ltd.
- Lei ZHU
- 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
Determining Enantiomeric Excess Using Indicator-Displacement Assays
- Publication number 20070292968
- Publication date Dec 20, 2007
- Eric V. Anslyn
- G01 - MEASURING TESTING
Information Patent Application
Determining enantiomeric excess using indicator-displacement assays
- Publication number 20060003459
- Publication date Jan 5, 2006
- University of Texas at Austin
- Eric V. Anslyn
- G01 - MEASURING TESTING

Person

Patents Grantslast 30 patents

On-chip inductor with audio headphone amplifier

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...

Control of switches in a variable impedance element

Amplifier offset cancellation using amplifier supply voltage

Gain control in a class-D open-loop amplifier

Increased noise performance using quantizer code suppression

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

Closed-loop digital compensation scheme

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

Cross-fading in dual-path pulse width modulation system

Control of switches in a variable impedance element

Calibration of a dual-path pulse width modulation system

Fully-differential operational amplifier system

Calibration of a dual-path pulse width modulation system

Offset calibration for amplifier and preceding circuit

Closed-loop digital compensation scheme

Calibration of a dual-path pulse width modulation system

Amplifier offset cancellation using amplifier supply voltage

Digital PWM modulator

Switching in amplifier with configurable final output stage

Calibration for amplifier with configurable final output stage

Multi-bit pulsed latch cell for use in an integrated circuit

Multi-bit pulsed latch cell for use in an integrated circuit

Determining enantiomeric excess using indicator-displacement assays

Patents Applicationslast 30 patents

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

DUAL BOOTSTRAPPING FOR AN OPEN-LOOP PULSE WIDTH MODULATION DRIVER

AMPLIFIER OFFSET CANCELLATION USING AMPLIFIER SUPPLY VOLTAGE

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

GAIN CONTROL IN A CLASS-D OPEN-LOOP AMPLIFIER

CONTROL OF SWITCHES IN A VARIABLE IMPEDANCE ELEMENT

DUAL BOOTSTRAPPING FOR AN OPEN-LOOP PULSE WIDTH MODULATION DRIVER

CLOSED-LOOP DIGITAL COMPENSATION SCHEME

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

AMPLIFIER OFFSET CANCELLATION USING AMPLIFIER SUPPLY VOLTAGE

CONTROL OF SWITCHES IN A VARIABLE IMPEDANCE ELEMENT

DIGITAL PWM MODULATOR

CLOSED-LOOP DIGITAL COMPENSATION SCHEME

OFFSET CALIBRATION FOR AMPLIFIER AND PRECEDING CIRCUIT

FULLY-DIFFERENTIAL OPERATIONAL AMPLIFIER SYSTEM

Determining Enantiomeric Excess Using Indicator-Displacement Assays

Determining enantiomeric excess using indicator-displacement assays