Walter Stuart Schopfer

Person

Austin, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Circuit device and method of providing feedback across an isolation...
- Patent number 8,004,863
- Issue date Aug 23, 2011
- Silicon Laboratories Inc.
- Walter Stuart Schopfer
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for power savings in a switching regulator
- Patent number 7,541,790
- Issue date Jun 2, 2009
- Silicon Laboratories Inc.
- Walter S. Schopfer
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Multi-mode regulator
- Patent number 7,450,360
- Issue date Nov 11, 2008
- Silicon Laboratories Inc.
- Walter S. Schopfer
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method and apparatus for handling voice and data signals
- Patent number 6,990,191
- Issue date Jan 24, 2006
- Legerity, Inc.
- Jeffrey Jay Anderson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for sensing current
- Patent number 6,778,663
- Issue date Aug 17, 2004
- Legerity, Inc.
- Walter S. Schopfer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for impedance matching
- Patent number 6,728,370
- Issue date Apr 27, 2004
- Legerity, Inc.
- Jeffrey J. Anderson
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method and apparatus for detecting and measuring foreign voltages
- Patent number 6,356,624
- Issue date Mar 12, 2002
- Leserity, Inc.
- Russell J. Apfel
- G01 - MEASURING TESTING
Information Patent Grant
Digital direct current feed control for a communication system
- Patent number 5,878,133
- Issue date Mar 2, 1999
- Advanced Micro Devices, Inc.
- Yan Zhou
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Integrated ring sensor with fault detection
- Patent number 5,809,109
- Issue date Sep 15, 1998
- Advanced Micro Devices, Inc.
- Michael Moyal
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Power cross detection using loop current and voltage
- Patent number 5,640,451
- Issue date Jun 17, 1997
- Advanced Micro Devices Inc.
- Walter S. Schopfer
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Protection circuit for telephone systems
- Patent number 5,638,440
- Issue date Jun 10, 1997
- Advanced Micro Devices, Inc.
- Michael A. Nix
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Integrated ring detection circuit and power cross detection circuit...
- Patent number 5,636,273
- Issue date Jun 3, 1997
- Walter S. Schopfer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for controlling a current supply device
- Patent number 5,249,226
- Issue date Sep 28, 1993
- Advanced Micro Devices, Inc.
- Walter S. Schopfer
- G05 - CONTROLLING REGULATING

Patents Applicationslast 30 patents

Information Patent Application
CIRCUIT DEVICE AND METHOD OF PROVIDING FEEDBACK ACROSS AN ISOLATION...
- Publication number 20090168462
- Publication date Jul 2, 2009
- Silicon Laboratories Inc.
- Walter Stuart Schopfer
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method and apparatus for power savings in a switching regulator
- Publication number 20070285069
- Publication date Dec 13, 2007
- Walter S. Schopfer
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Multi-mode regulator
- Publication number 20070279819
- Publication date Dec 6, 2007
- Walter S. Schopfer
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Method and apparatus for handling voice and data signals
- Publication number 20020114444
- Publication date Aug 22, 2002
- Jeffrey Jay Anderson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Walter Stuart Schopfer

Person

Patents Grantslast 30 patents

Circuit device and method of providing feedback across an isolation...

Method and apparatus for power savings in a switching regulator

Multi-mode regulator

Method and apparatus for handling voice and data signals

Method and apparatus for sensing current

Method and apparatus for impedance matching

Method and apparatus for detecting and measuring foreign voltages

Digital direct current feed control for a communication system

Integrated ring sensor with fault detection

Power cross detection using loop current and voltage

Protection circuit for telephone systems

Integrated ring detection circuit and power cross detection circuit...

Apparatus for controlling a current supply device

Patents Applicationslast 30 patents

CIRCUIT DEVICE AND METHOD OF PROVIDING FEEDBACK ACROSS AN ISOLATION...

Method and apparatus for power savings in a switching regulator

Multi-mode regulator

Method and apparatus for handling voice and data signals