Inventor · disambiguated record
David William Boerstler
Also filed as: BOERSTLER DAVID · BOERSTLER DAVID W · BOERSTLER DAVID WILLIAM
142 granted patents·15 pending applications·1,921 citations·filing 1990–2011
99Inventor score
Files withIBM138BOERSTLER DAVID W8TOSHIBA KK4BOERSTLER DAVID WILLIAM3SONY COMPUTER ENTERTAINMENT INC2
Top patents by PatentIndex Score
157 records- 0194US6980060B2Adaptive method and apparatus to control loop bandwidth of a phase lock loopIBM·Filed 2003·Granted Dec 27, 2005·58 cites·9 claims
- 0292US7511554B2Systems and methods for level shifting using AC couplingTOSHIBA KK·Filed 2007·Granted Mar 31, 2009·20 cites·11 claims
- 0392US7245161B2Apparatus and method for verifying glitch-free operation of a multiplexerIBM·Filed 2005·Granted Jul 17, 2007·22 cites·20 claims
- 0492US6501313B2Dynamic duty cycle adjusterIBM·Filed 2000·Granted Dec 31, 2002·48 cites·19 claims
- 0591US7322001B2Apparatus and method for automatically self-calibrating a duty cycle circuit for maximum chip performanceIBM·Filed 2005·Granted Jan 22, 2008·18 cites·24 claims
- 0691US5903012AProcess variation monitor for integrated circuitsIBM·Filed 1997·Granted May 11, 1999·60 cites·24 claims
- 0790US7675338B2Duty cycle correction circuit whose operation is largely independent of operating voltage and processIBM·Filed 2008·Granted Mar 9, 2010·15 cites·11 claims
- 0890US6515530B1Dynamically scalable low voltage clock generation systemIBM·Filed 2001·Granted Feb 4, 2003·65 cites·26 claims
- 0990US5977801ASelf-resetting phase/frequency detector with reduced dead zoneIBM·Filed 1997·Granted Nov 2, 1999·82 cites·14 claims
- 1089US7360135B2Apparatus and method for automatically self-calibrating a duty cycle circuit for maximum chip performanceIBM·Filed 2007·Granted Apr 15, 2008·14 cites·23 claims
- 1188US7233212B2Oscillator array with row and column controlIBM·Filed 2005·Granted Jun 19, 2007·16 cites·20 claims
- 1288US6927604B2Clock signal selector circuit with reduced probability of erroneous output due to metastabilityIBM·Filed 2003·Granted Aug 9, 2005·34 cites·20 claims
- 1388US5892409ACMOS process compensation circuitIBM·Filed 1997·Granted Apr 6, 1999·56 cites·15 claims
- 1487US7200064B1Apparatus and method for providing a reprogrammable electrically programmable fuseIBM·Filed 2005·Granted Apr 3, 2007·20 cites·35 claims
- 1587US6914953B2Multiphase clock recovery using D-type phase detectorIBM·Filed 2000·Granted Jul 5, 2005·53 cites·22 claims
- 1687US5821809ACMOS high-speed differential to single-ended converter circuitIBM·Filed 1996·Granted Oct 13, 1998·62 cites·17 claims
- 1786US6501304B1Glitch-less clock selectorIBM·Filed 2001·Granted Dec 31, 2002·44 cites·23 claims
- 1885US7245172B2Level shifter apparatus and method for minimizing duty cycle distortionIBM·Filed 2005·Granted Jul 17, 2007·13 cites·20 claims
- 1985US6147508APower consumption control mechanism and method thereforIBM·Filed 1998·Granted Nov 14, 2000·48 cites·38 claims
- 2084US6763474B1System for synchronizing nodes in a heterogeneous computer system by using multistage frequency synthesizer to dynamically adjust clock frequency of the nodesIBM·Filed 2000·Granted Jul 13, 2004·35 cites·12 claims
- 2183US7330061B2Method and apparatus for correcting the duty cycle of a digital signalIBM·Filed 2006·Granted Feb 12, 2008·12 cites·35 claims
- 2283US6559727B2High-frequency low-voltage multiphase voltage-controlled oscillatorIBM·Filed 2000·Granted May 6, 2003·26 cites·10 claims
- 2383US6483888B1Clock divider with bypass and stop clockIBM·Filed 2001·Granted Nov 19, 2002·34 cites·20 claims
- 2483US6441667B1Multiphase clock generatorIBM·Filed 2001·Granted Aug 27, 2002·29 cites·30 claims
- 2583US5668507ANoise generator for evaluating mixed signal integrated circuitsIBM·Filed 1996·Granted Sep 16, 1997·34 cites·20 claims
- 2681US7417480B2Duty cycle correction circuit whose operation is largely independent of operating voltage and processIBM·Filed 2006·Granted Aug 26, 2008·9 cites·7 claims
- 2781US7391277B2Interleaved voltage controlled oscillatorIBM·Filed 2006·Granted Jun 24, 2008·8 cites·4 claims
- 2881US7356716B2System and method for automatic calibration of a reference voltageIBM·Filed 2005·Granted Apr 8, 2008·9 cites·5 claims
- 2981US7350095B2Digital circuit to measure and/or correct duty cyclesIBM·Filed 2005·Granted Mar 25, 2008·9 cites·1 claims
- 3080US7363178B2Method and apparatus for measuring the relative duty cycle of a clock signalIBM·Filed 2006·Granted Apr 22, 2008·10 cites·9 claims
- 3180US7333905B2Method and apparatus for measuring the duty cycle of a digital signalIBM·Filed 2006·Granted Feb 19, 2008·8 cites·14 claims
- 3280US6809602B2Multi-mode VCOIBM·Filed 2001·Granted Oct 26, 2004·22 cites·24 claims
- 3380US5870003AHigh frequency phase-locked loop circuit having reduced jitterIBM·Filed 1997·Granted Feb 9, 1999·46 cites·12 claims
- 3479US6529084B1Interleaved feedforward VCO and PLLIBM·Filed 2001·Granted Mar 4, 2003·23 cites·23 claims
- 3577US7913199B2Structure for a duty cycle correction circuitIBM·Filed 2008·Granted Mar 22, 2011·8 cites·14 claims
- 3677US7789558B2Thermal sensing circuit using bandgap voltage reference generators without trimming circuitryTOSHIBA KK·Filed 2009·Granted Sep 7, 2010·8 cites·20 claims
- 3777US7595675B2Duty cycle measurement method and apparatus that operates in a calibration mode and a test modeIBM·Filed 2006·Granted Sep 29, 2009·8 cites·31 claims
- 3877US6353369B1Multiphase voltage controlled oscillator with variable gain and rangeIBM·Filed 2000·Granted Mar 5, 2002·19 cites·9 claims
- 3977US6188270B1Low-voltage reference circuitIBM·Filed 1998·Granted Feb 13, 2001·31 cites·9 claims
- 4075US7260491B2Duty cycle measurement apparatus and methodIBM·Filed 2005·Granted Aug 21, 2007·6 cites·18 claims
- 4175US6229358B1Delayed matching signal generator and frequency multiplier using scaled delay networksIBM·Filed 1999·Granted May 8, 2001·28 cites·22 claims
- 4275US5757240ALow gain voltage-controlled oscillatorIBM·Filed 1996·Granted May 26, 1998·50 cites·20 claims
- 4374US7716516B2Method for controlling operation of microprocessor which performs duty cycle correction processSONY COMPUTER ENTERTAINMENT INC·Filed 2006·Granted May 11, 2010·6 cites·20 claims
- 4474US7420400B2Method and apparatus for on-chip duty cycle measurementIBM·Filed 2006·Granted Sep 2, 2008·7 cites·13 claims
- 4574US7113881B2Method and apparatus for semi-automatic extraction and monitoring of diode ideality in a manufacturing environmentIBM·Filed 2004·Granted Sep 26, 2006·14 cites·21 claims
- 4674US6222402B1Differential charge-pump with improved linearityIBM·Filed 1998·Granted Apr 24, 2001·38 cites·15 claims
- 4773US8037431B2Structure for interleaved voltage controlled oscillatorIBM·Filed 2008·Granted Oct 11, 2011·5 cites·9 claims
- 4873US7493229B2Adjusting voltage for a phase locked loop based on temperatureIBM·Filed 2007·Granted Feb 17, 2009·8 cites·13 claims
- 4973US7279996B2Method of functionality testing for a ring oscillatorIBM·Filed 2005·Granted Oct 9, 2007·7 cites·18 claims
- 5073US6621358B2Differential voltage controlled oscillator, and method thereforIBM·Filed 2001·Granted Sep 16, 2003·16 cites·22 claims
Showing the top 50 of 157 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when David William Boerstler files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →