Inventor
KELKAR RAM
US36 patents
⚠️ This page may combine multiple inventors who share the name “KELKAR RAM”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
34 patentsUS5491439AFeb 13, 1996
Method and apparatus for reducing jitter in a phase locked loop circuit
IBM49 citations96
US5663991ASep 2, 1997
Integrated circuit chip having built-in self measurement for PLL jitter and phase error
IBM63 citations94
US6917662B2Jul 12, 2005
Programmable low-power high-frequency divider
IBM13 citations92
US6456165B1Sep 24, 2002
Phase error control for phase-locked loops
IBM24 citations92
US6300838B1Oct 9, 2001
Method and apparatus for derivative controlled phase locked loop systems
IBM24 citations92
US6057719AMay 2, 2000
Programmable, self-resetting divider
IBM19 citations92
US6009139ADec 28, 1999
Asynchronously programmable frequency divider circuit with a symmetrical output
IBM35 citations92
US5680076AOct 21, 1997
Phase-lock indicator circuit with phase-only detection
IBM25 citations91
US5656977AAug 12, 1997
Frequency-lock indicator circuit with frequency-only detection
IBM19 citations91
US5541442AJul 30, 1996
Integrated compact capacitor-resistor/inductor configuration
IBM54 citations89
US5525932AJun 11, 1996
Lock indicator for phase locked loop circuit
IBM46 citations89
US5828255AOct 27, 1998
Phase locked loop having adaptive jitter reduction
IBM41 citations87
US8373510B2Feb 12, 2013
Programmable filter for LC tank voltage controlled oscillator (VCO), design structure and method thereof
IBM9 citations84
US7545191B2Jun 9, 2009
Method for dividing a high-frequency signal
IBM9 citations84
US7355486B2Apr 8, 2008
Current controlled oscillation device and method having wide frequency range
IBM11 citations83
US7391271B2Jun 24, 2008
Adjustment of PLL bandwidth for jitter control using feedback circuitry
IBM13 citations81
US7049864B2May 23, 2006
Apparatus and method for high frequency state machine divider with low power consumption
IBM8 citations74
US6943608B2Sep 13, 2005
Wide frequency range voltage-controlled oscillators (VCO)
IBM8 citations74
US9425736B2Aug 23, 2016
Variable capacitor structure
IBM4 citations73
US6876238B1Apr 5, 2005
Charge pump
IBM7 citations73
US5513225AApr 30, 1996
Resistorless phase locked loop circuit employing direct current injection
IBM12 citations72
US7378890B2May 27, 2008
Programmable low-power high-frequency divider
IBM2 citations63
US7342429B2Mar 11, 2008
Programmable low-power high-frequency divider
IBM2 citations63
US7180973B2Feb 20, 2007
Programmable low-power high-frequency divider
IBM1 citations63
US7075350B2Jul 11, 2006
Programmable low-power high-frequency divider
IBM3 citations63
US6882230B2Apr 19, 2005
System and method for control parameter re-centering in a controlled phase lock loop system
IBM4 citations63
US8912854B2Dec 16, 2014
Structure for an inductor-capacitor voltage-controlled oscillator
IBM2 citations62
US7915963B2Mar 29, 2011
Current controlled oscillation device and method having wide frequency range
IBM3 citations62
US7710206B2May 4, 2010
Design structure for improved current controlled oscillation device and method having wide frequency range
IBM3 citations62
US9252717B2Feb 2, 2016
Phase noise reduction in LC-VCO
IBM0 citations52
US7532040B1May 12, 2009
Programmable sensitivity frequency coincidence detection circuit and method
IBM1 citations52
US7489207B1Feb 10, 2009
Structure for voltage controlled oscillator
IBM0 citations42
US7728687B2Jun 1, 2010
Negative resistance oscillator with additional bias current injection
IBM0 citations41
US6940324B2Sep 6, 2005
Variation of effective filter capacitance in phase lock loop circuit loop filters
IBM0 citations41