William D. Llewellyn

Person

San Jose, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Methods and apparatus related to protection of a speaker
- Patent number 10,015,608
- Issue date Jul 3, 2018
- FAIRCHILD SEMICONDUCTOR CORPORATION
- Philip Crawley
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Protection of a speaker using temperature calibration
- Patent number 9,729,986
- Issue date Aug 8, 2017
- Fairchild Semiconductor Corporation
- Philip Crawley
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual-mode voltage doubling buck converter with smooth mode transition
- Patent number 9,647,546
- Issue date May 9, 2017
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Subsonic test signal generation technique
- Patent number 9,083,322
- Issue date Jul 14, 2015
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Class D pulse width modulator with dual feedback
- Patent number 8,866,544
- Issue date Oct 21, 2014
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier crosstalk cancellation technique
- Patent number 8,831,230
- Issue date Sep 9, 2014
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Edge rate control
- Patent number 8,638,148
- Issue date Jan 28, 2014
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Amplifier current drive reversal
- Patent number 7,821,338
- Issue date Oct 26, 2010
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Programmable gain amplifier with hybrid digital/analog architecture
- Patent number 7,515,310
- Issue date Apr 7, 2009
- National Semiconductor Corporation
- William Llewellyn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for spread spectrum clock generator with accum...
- Patent number 7,443,905
- Issue date Oct 28, 2008
- National Semiconductor Corporation
- William Llewellyn
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Apparatus and method for ping-pong mismatch correction
- Patent number 7,236,117
- Issue date Jun 26, 2007
- National Semiconductor Corporation
- Seema Varma
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
DC offset self-calibration system for a switching amplifier
- Patent number 7,026,866
- Issue date Apr 11, 2006
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Methods and apparatus for enabling or disabling an amplifier
- Patent number 6,785,392
- Issue date Aug 31, 2004
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
DC offset self-calibration system for a digital switching amplifier
- Patent number 6,724,248
- Issue date Apr 20, 2004
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Noise reduction scheme for operational amplifiers
- Patent number 6,566,946
- Issue date May 20, 2003
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Noise reduction scheme for operational amplifiers
- Patent number 6,329,876
- Issue date Dec 11, 2001
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method and apparatus for controlling an audio signal level
- Patent number 6,127,893
- Issue date Oct 3, 2000
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method of reading and writing data on a magnetic medium
- Patent number 5,912,779
- Issue date Jun 15, 1999
- William D. Llewellyn
- G11 - INFORMATION STORAGE
Information Patent Grant
Multiple gap read/write head for data storage devices
- Patent number 5,644,457
- Issue date Jul 1, 1997
- National Semiconductor Corporation
- William D. Llewellyn
- G11 - INFORMATION STORAGE
Information Patent Grant
Simplified window de-skewing in a serial data receiver
- Patent number 5,579,352
- Issue date Nov 26, 1996
- National Semiconductor Corporation
- William D. Llewellyn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Spring starter for a hard disk drive platter assembly
- Patent number 5,572,505
- Issue date Nov 5, 1996
- William D. Llewellyn
- G11 - INFORMATION STORAGE
Information Patent Grant
Single-ended pulse gating circuit
- Patent number 5,463,655
- Issue date Oct 31, 1995
- National Semiconductor Corporation
- William D. Llewellyn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiple gap read/write head for data storage devices
- Patent number 5,426,539
- Issue date Jun 20, 1995
- National Semiconductor Corporation
- William D. Llewellyn
- G11 - INFORMATION STORAGE
Information Patent Grant
Current mirror with improved input voltage headroom
- Patent number 5,394,079
- Issue date Feb 28, 1995
- National Semiconductor Corporation
- William D. Llewellyn
- G05 - CONTROLLING REGULATING
Information Patent Grant
Multi-tap digital delay line
- Patent number 5,374,860
- Issue date Dec 20, 1994
- National Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Low-current digital-to-analog converter
- Patent number 5,361,068
- Issue date Nov 1, 1994
- National Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Frequency synthesizing phase lock loop with unvarying loop parameters
- Patent number 5,339,050
- Issue date Aug 16, 1994
- National Semiconductor Corp.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Multiple biasing phase-lock-loops controlling center frequency of p...
- Patent number 5,329,251
- Issue date Jul 12, 1994
- National Semiconductor Corporation
- William D. Llewellyn
- G11 - INFORMATION STORAGE
Information Patent Grant
Unity-gain, wide bandwidth, bipolar voltage follower with a very lo...
- Patent number 5,302,915
- Issue date Apr 12, 1994
- National Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Attenuating voltage follower circuit
- Patent number 5,287,054
- Issue date Feb 15, 1994
- National Semiconductor Corporation
- William D. Llewellyn
- G05 - CONTROLLING REGULATING

Patents Applicationslast 30 patents

Information Patent Application
METHODS AND APPARATUS RELATED TO PROTECTION OF A SPEAKER
- Publication number 20170303057
- Publication date Oct 19, 2017
- FAIRCHILD SEMICONDUCTOR CORPORATION
- Philip CRAWLEY
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Dual-Mode Voltage Doubling Buck Converter With Smooth Mode Transition
- Publication number 20150162834
- Publication date Jun 11, 2015
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
METHODS AND APPARATUS RELATED TO PROTECTION OF A SPEAKER
- Publication number 20140126730
- Publication date May 8, 2014
- Fairchild Semiconductor Corporation
- Philip CRAWLEY
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SUBSONIC TEST SIGNAL GENERATION TECHNIQUE
- Publication number 20130016844
- Publication date Jan 17, 2013
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AMPLIFIER CROSSTALK CANCELLATION TECHNIQUE
- Publication number 20120262230
- Publication date Oct 18, 2012
- William D. Llewellyn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CLASS D PULSE WIDTH MODULATOR WITH DUAL FEEDBACK
- Publication number 20120262211
- Publication date Oct 18, 2012
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
EDGE RATE CONTROL (ERC) PRE-BIASING TECHNIQUE
- Publication number 20120206191
- Publication date Aug 16, 2012
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
EDGE RATE CONTROL
- Publication number 20110084746
- Publication date Apr 14, 2011
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
AMPLIFIER CURRENT DRIVE REVERSAL
- Publication number 20100001799
- Publication date Jan 7, 2010
- Fairchild Semiconductor Corporation
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Programmable gain amplifier with hybrid digital/analog architecture
- Publication number 20050195448
- Publication date Sep 8, 2005
- National Semiconductor
- William Llewellyn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DC offset self-calibration system for a switching amplifier
- Publication number 20040227567
- Publication date Nov 18, 2004
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
DC offset self-calibration system for a digital switching amplifier
- Publication number 20020186075
- Publication date Dec 12, 2002
- Tripath Technology Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Noise reduction scheme for operational amplifiers
- Publication number 20010052815
- Publication date Dec 20, 2001
- Tripath Technology, Inc.
- William D. Llewellyn
- H03 - BASIC ELECTRONIC CIRCUITRY

William D. Llewellyn

Person

Patents Grantslast 30 patents

Methods and apparatus related to protection of a speaker

Protection of a speaker using temperature calibration

Dual-mode voltage doubling buck converter with smooth mode transition

Subsonic test signal generation technique

Class D pulse width modulator with dual feedback

Amplifier crosstalk cancellation technique

Edge rate control

Amplifier current drive reversal

Programmable gain amplifier with hybrid digital/analog architecture

Apparatus and method for spread spectrum clock generator with accum...

Apparatus and method for ping-pong mismatch correction

DC offset self-calibration system for a switching amplifier

Methods and apparatus for enabling or disabling an amplifier

DC offset self-calibration system for a digital switching amplifier

Noise reduction scheme for operational amplifiers

Noise reduction scheme for operational amplifiers

Method and apparatus for controlling an audio signal level

Method of reading and writing data on a magnetic medium

Multiple gap read/write head for data storage devices

Simplified window de-skewing in a serial data receiver

Spring starter for a hard disk drive platter assembly

Single-ended pulse gating circuit

Multiple gap read/write head for data storage devices

Current mirror with improved input voltage headroom

Multi-tap digital delay line

Low-current digital-to-analog converter

Frequency synthesizing phase lock loop with unvarying loop parameters

Multiple biasing phase-lock-loops controlling center frequency of p...

Unity-gain, wide bandwidth, bipolar voltage follower with a very lo...

Attenuating voltage follower circuit

Patents Applicationslast 30 patents

METHODS AND APPARATUS RELATED TO PROTECTION OF A SPEAKER

Dual-Mode Voltage Doubling Buck Converter With Smooth Mode Transition

METHODS AND APPARATUS RELATED TO PROTECTION OF A SPEAKER

SUBSONIC TEST SIGNAL GENERATION TECHNIQUE

AMPLIFIER CROSSTALK CANCELLATION TECHNIQUE

CLASS D PULSE WIDTH MODULATOR WITH DUAL FEEDBACK

EDGE RATE CONTROL (ERC) PRE-BIASING TECHNIQUE

EDGE RATE CONTROL

AMPLIFIER CURRENT DRIVE REVERSAL

Programmable gain amplifier with hybrid digital/analog architecture

DC offset self-calibration system for a switching amplifier

DC offset self-calibration system for a digital switching amplifier

Noise reduction scheme for operational amplifiers