Inventor · disambiguated record
Walter S. Schopfer
Also filed as: SCHOPFER WALTER S · SCHOPFER WALTER STUART
13 granted patents·213 citations·filing 1992–2007
92Inventor score
Top patents by PatentIndex Score
13 records- 0173US6778663B1Method and apparatus for sensing currentLEGERITY INC·Filed 2000·Granted Aug 17, 2004·16 cites·25 claims
- 0272US6990191B2Method and apparatus for handling voice and data signalsLEGERITY INC·Filed 2000·Granted Jan 24, 2006·14 cites·24 claims
- 0372US5878133ADigital direct current feed control for a communication systemADVANCED MICRO DEVICES INC·Filed 1996·Granted Mar 2, 1999·61 cites·21 claims
- 0456US5640451APower cross detection using loop current and voltageADVANCED MICRO DEVICES INC·Filed 1996·Granted Jun 17, 1997·14 cites·10 claims
- 0556US5636273AIntegrated ring detection circuit and power cross detection circuit with persistence timersADVANCED MICRO DEVICES INC·Filed 1995·Granted Jun 3, 1997·29 cites·20 claims
- 0653US7541790B2Method and apparatus for power savings in a switching regulatorSILICON LAB INC·Filed 2006·Granted Jun 2, 2009·3 cites·8 claims
- 0753US7450360B2Multi-mode regulatorSILICON LAB INC·Filed 2006·Granted Nov 11, 2008·3 cites·16 claims
- 0852US8004863B2Circuit device and method of providing feedback across an isolation barrierSILICON LAB INC·Filed 2007·Granted Aug 23, 2011·3 cites·25 claims
- 0951US5809109AIntegrated ring sensor with fault detectionADVANCED MICRO DEVICES INC·Filed 1995·Granted Sep 15, 1998·22 cites·13 claims
- 1049US6356624B1Method and apparatus for detecting and measuring foreign voltagesLEGERITY INC·Filed 1998·Granted Mar 12, 2002·17 cites·25 claims
- 1147US5638440AProtection circuit for telephone systemsADVANCED MICRO DEVICES INC·Filed 1995·Granted Jun 10, 1997·15 cites·26 claims
- 1243US6728370B1Method and apparatus for impedance matchingLEGERITY INC·Filed 1999·Granted Apr 27, 2004·7 cites·22 claims
- 1339US5249226AApparatus for controlling a current supply deviceADVANCED MICRO DEVICES INC·Filed 1992·Granted Sep 28, 1993·9 cites·7 claims
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