Inventor · disambiguated record
Ram Kelkar
Also filed as: KELKAR RAM
36 granted patents·1 pending application·515 citations·filing 1994–2014
97Inventor score
Top patents by PatentIndex Score
37 records- 0185US7545191B2Method for dividing a high-frequency signalIBM·Filed 2008·Granted Jun 9, 2009·9 cites·4 claims
- 0285US5491439AMethod and apparatus for reducing jitter in a phase locked loop circuitIBM·Filed 1994·Granted Feb 13, 1996·49 cites·9 claims
- 0383US7391271B2Adjustment of PLL bandwidth for jitter control using feedback circuitryIBM·Filed 2006·Granted Jun 24, 2008·13 cites·11 claims
- 0482US7355486B2Current controlled oscillation device and method having wide frequency rangeIBM·Filed 2006·Granted Apr 8, 2008·11 cites·5 claims
- 0581US9425736B2Variable capacitor structureIBM·Filed 2014·Granted Aug 23, 2016·4 cites·20 claims
- 0680US8373510B2Programmable filter for LC tank voltage controlled oscillator (VCO), design structure and method thereofIBM·Filed 2008·Granted Feb 12, 2013·9 cites·26 claims
- 0780US6009139AAsynchronously programmable frequency divider circuit with a symmetrical outputIBM·Filed 1998·Granted Dec 28, 1999·35 cites·20 claims
- 0880US5541442AIntegrated compact capacitor-resistor/inductor configurationIBM·Filed 1994·Granted Jul 30, 1996·54 cites·8 claims
- 0977US6917662B2Programmable low-power high-frequency dividerIBM·Filed 2003·Granted Jul 12, 2005·13 cites·16 claims
- 1077US6456165B1Phase error control for phase-locked loopsIBM·Filed 2000·Granted Sep 24, 2002·24 cites·10 claims
- 1176US5525932ALock indicator for phase locked loop circuitIBM·Filed 1994·Granted Jun 11, 1996·46 cites·10 claims
- 1275US5828255APhase locked loop having adaptive jitter reductionIBM·Filed 1996·Granted Oct 27, 1998·41 cites·17 claims
- 1372US5663991AIntegrated circuit chip having built-in self measurement for PLL jitter and phase errorIBM·Filed 1996·Granted Sep 2, 1997·63 cites·19 claims
- 1469US8912854B2Structure for an inductor-capacitor voltage-controlled oscillatorIBM·Filed 2013·Granted Dec 16, 2014·2 cites·21 claims
- 1565US7075350B2Programmable low-power high-frequency dividerIBM·Filed 2005·Granted Jul 11, 2006·3 cites·16 claims
- 1665US6057719AProgrammable, self-resetting dividerIBM·Filed 1998·Granted May 2, 2000·19 cites·20 claims
- 1764US6300838B1Method and apparatus for derivative controlled phase locked loop systemsIBM·Filed 1999·Granted Oct 9, 2001·24 cites·5 claims
- 1862US7049864B2Apparatus and method for high frequency state machine divider with low power consumptionIBM·Filed 2004·Granted May 23, 2006·8 cites·15 claims
- 1962US6943608B2Wide frequency range voltage-controlled oscillators (VCO)IBM·Filed 2003·Granted Sep 13, 2005·8 cites·20 claims
- 2061US5680076APhase-lock indicator circuit with phase-only detectionIBM·Filed 1996·Granted Oct 21, 1997·25 cites·15 claims
- 2158US7915963B2Current controlled oscillation device and method having wide frequency rangeIBM·Filed 2007·Granted Mar 29, 2011·3 cites·7 claims
- 2257US7378890B2Programmable low-power high-frequency dividerIBM·Filed 2007·Granted May 27, 2008·2 cites·12 claims
- 2356US7710206B2Design structure for improved current controlled oscillation device and method having wide frequency rangeIBM·Filed 2008·Granted May 4, 2010·3 cites·10 claims
- 2456US7342429B2Programmable low-power high-frequency dividerIBM·Filed 2006·Granted Mar 11, 2008·2 cites·14 claims
- 2555US5656977AFrequency-lock indicator circuit with frequency-only detectionIBM·Filed 1996·Granted Aug 12, 1997·19 cites·12 claims
- 2654US7532040B1Programmable sensitivity frequency coincidence detection circuit and methodIBM·Filed 2007·Granted May 12, 2009·1 cites·19 claims
- 2754US7180973B2Programmable low-power high-frequency dividerIBM·Filed 2006·Granted Feb 20, 2007·1 cites·15 claims
- 2853US6876238B1Charge pumpIBM·Filed 2003·Granted Apr 5, 2005·7 cites·20 claims
- 2952US9281779B2Structure for an inductor-capacitor voltage-controlled oscillatorGLOBALFOUNDRIES INC·Filed 2014·Granted Mar 8, 2016·0 cites·16 claims
- 3050US8648634B2Input jitter filter for a phase-locked loop (PLL)KELKAR RAM·Filed 2012·Granted Feb 11, 2014·1 cites·18 claims
- 3149US9252717B2Phase noise reduction in LC-VCOIBM·Filed 2014·Granted Feb 2, 2016·0 cites·20 claims
- 3247US6882230B2System and method for control parameter re-centering in a controlled phase lock loop systemIBM·Filed 2003·Granted Apr 19, 2005·4 cites·20 claims
- 3345US7489207B1Structure for voltage controlled oscillatorIBM·Filed 2008·Granted Feb 10, 2009·0 cites·1 claims
- 3445US5513225AResistorless phase locked loop circuit employing direct current injectionIBM·Filed 1994·Granted Apr 30, 1996·12 cites·5 claims
- 3541US2008218229A1Adjustment of pll bandwidth for jitter control using feedback circuitryIBM·Filed 2008·Application pending·0 cites
- 3640US7728687B2Negative resistance oscillator with additional bias current injectionIBM·Filed 2005·Granted Jun 1, 2010·0 cites·8 claims
- 3734US6940324B2Variation of effective filter capacitance in phase lock loop circuit loop filtersIBM·Filed 2003·Granted Sep 6, 2005·0 cites·10 claims
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