Inventor · disambiguated record
David M. Friend
Also filed as: FRIEND DAVID M · FRIEND DAVID MICHAEL
28 granted patents·3 pending applications·194 citations·filing 2001–2023
95Inventor score
Top patents by PatentIndex Score
31 records- 0197US9467092B1Phased locked loop with multiple voltage controlled oscillatorsIBM·Filed 2015·Granted Oct 11, 2016·12 cites·20 claims
- 0293US6538522B1Method and ring oscillator for evaluating dynamic circuitsIBM·Filed 2001·Granted Mar 25, 2003·53 cites·20 claims
- 0392US8917126B1Charge pump operating voltage range control using dynamic biasingIBM·Filed 2013·Granted Dec 23, 2014·14 cites·16 claims
- 0489US8373486B2Structure for a frequency adaptive level shifter circuitIBM·Filed 2012·Granted Feb 12, 2013·8 cites·14 claims
- 0582US6668358B2Dual threshold gate array or standard cell power saving library circuitsIBM·Filed 2001·Granted Dec 23, 2003·41 cites·2 claims
- 0678US10088519B1Electromigration monitorIBM·Filed 2017·Granted Oct 2, 2018·2 cites·20 claims
- 0776US9882552B2Low power amplifierIBM·Filed 2015·Granted Jan 30, 2018·3 cites·15 claims
- 0875US6909159B2Method and apparatus to make a semiconductor chip susceptible to radiation failureIBM·Filed 2002·Granted Jun 21, 2005·24 cites·17 claims
- 0971US6437602B1Fully dynamic logic network circuitsIBM·Filed 2001·Granted Aug 20, 2002·15 cites·17 claims
- 1069US12500581B2Multi-phase clock generation circuit with digital calibrationIBM·Filed 2023·Granted Dec 16, 2025·0 cites·16 claims
- 1167US6990510B2Wide adder with critical path of three gatesIBM·Filed 2002·Granted Jan 24, 2006·12 cites·16 claims
- 1266US9929722B1Wire capacitor for transmitting AC signalsIBM·Filed 2017·Granted Mar 27, 2018·1 cites·20 claims
- 1363US10250267B2Differential phase-frequency detectorIBM·Filed 2017·Granted Apr 2, 2019·1 cites·20 claims
- 1463US8513957B2Implementing integral dynamic voltage sensing and triggerCHERUIYOT KENNEDY K·Filed 2010·Granted Aug 20, 2013·2 cites·17 claims
- 1561US9571109B2Voltage controlled oscillator runaway preventionIBM·Filed 2015·Granted Feb 14, 2017·1 cites·6 claims
- 1661US9391623B1Voltage controlled oscillator runaway preventionIBM·Filed 2016·Granted Jul 12, 2016·1 cites·1 claims
- 1759US9923565B2Differential phase-frequency detectorIBM·Filed 2014·Granted Mar 20, 2018·1 cites·20 claims
- 1859US9059660B1Variable frequency oscillator with specialized inverter stagesIBM·Filed 2013·Granted Jun 16, 2015·1 cites·12 claims
- 1959US8994117B2Moat construction to reduce noise coupling to a quiet supplyIBM·Filed 2012·Granted Mar 31, 2015·1 cites·6 claims
- 2057US8751982B2Implementing dual speed level shifter with automatic mode controlFICKE JOEL T·Filed 2012·Granted Jun 10, 2014·1 cites·6 claims
- 2154US9871527B2Phase locked loop with sense amplifier circuitryIBM·Filed 2017·Granted Jan 16, 2018·0 cites·20 claims
- 2248US9455730B1Voltage controlled oscillator runaway preventionIBM·Filed 2015·Granted Sep 27, 2016·0 cites·6 claims
- 2347US10804905B2Using a burn-in operational amplifier for a phased locked loop regulatorIBM·Filed 2018·Granted Oct 13, 2020·0 cites·20 claims
- 2443US8324933B2Implementing dual speed level shifter with automatic mode controlFICKE JOEL T·Filed 2011·Granted Dec 4, 2012·0 cites·13 claims
- 2541US10326450B2Implementing cascade level shifter for analog voltageIBM·Filed 2017·Granted Jun 18, 2019·0 cites·20 claims
- 2640US10116260B2VCO selection and amplitude management using center tap inductorIBM·Filed 2015·Granted Oct 30, 2018·0 cites·14 claims
- 2738US2010001804A1System to improve a voltage-controlled oscillator and associated methodsFRIEND DAVID M·Filed 2008·Application pending·0 cites
- 2838US2009189653A1Phase Lock Loop Clock Distribution Method and SystemFRIEND DAVID M·Filed 2008·Application pending·0 cites
- 2937US8686782B2Structure for a frequency adaptive level shifter circuitFICKE JOEL THOMAS·Filed 2010·Granted Apr 1, 2014·0 cites·9 claims
- 3035US9197225B2Control voltage mirror circuitCHERUIYOT KENNEDY K·Filed 2011·Granted Nov 24, 2015·0 cites·8 claims
- 3133US2003205759A1Reduction of parasitic bipolar leakage current in silicon on insulator devicesIBM·Filed 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →