Inventor
MALIK RANDHIR S
US69 patents
⚠️ This page may combine multiple inventors who share the name “MALIK RANDHIR S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
40 patentsUS6487098B2Nov 26, 2002
Power factor correction (PFC) circuit that eliminates an inrush current limit circuit
IBM85 citations98
US6157168ADec 5, 2000
Secondary power supply for an uninterruptible power system
IBM134 citations98
US5319536AJun 7, 1994
Power system for parallel operation of AC/DC convertrs
IBM130 citations98
US6320771B1Nov 20, 2001
Fault tolerant active current sharing
IBM56 citations96
US6249411B1Jun 19, 2001
Over-voltage protection circuit and method for preventing system shutdown in a power system employing multiple power supplies
IBM54 citations96
US5367247ANov 22, 1994
Critically continuous boost converter
IBM117 citations94
US6697955B1Feb 24, 2004
Method and apparatus for using an energy reserve to provide voltage to a power factor correction circuit in the event of a power interuption
IBM31 citations93
US6434026B1Aug 13, 2002
Multiple output power supply circuit
IBM19 citations93
US6188588B1Feb 13, 2001
Switching controller and method for operating a flyback converter in a critically continuous conduction mode
IBM52 citations93
US6157555ADec 5, 2000
Current limiter responsive to changing parallel power supply capacity
IBM34 citations93
US5610803AMar 11, 1997
Pulse width modulated power supply that reduces overshoot
IBM38 citations93
US5561596AOct 1, 1996
AC line stabilization circuitry for high power factor loads
IBM35 citations93
US7888919B2Feb 15, 2011
Apparatus, system, and method for an adaptive high efficiency switching power supply
IBM23 citations92
US6630753B2Oct 7, 2003
Low cost redundant AC to DC power supply
IBM87 citations92
US7679217B2Mar 16, 2010
Apparatus, system, and method for a high efficiency redundant power system
IBM25 citations91
US6865094B2Mar 8, 2005
Circuit for AC adapter to reduce power drawn from an AC power source
IBM28 citations91
US7906871B2Mar 15, 2011
Apparatus, system, and method for reducing power consumption on devices with multiple power supplies
IBM21 citations90
US7698095B2Apr 13, 2010
Apparatus, system, and method for detecting fan rotation direction in electronic devices
IBM25 citations90
US5563758AOct 8, 1996
Circuit to permit three phase input power supply to operate when one phase drops out and provide lightening protection
IBM26 citations88
US6747424B1Jun 8, 2004
Integrated fan speed control and fault detection circuitry
IBM16 citations84
US6621718B1Sep 16, 2003
Resonant converter circuit
IBM15 citations84
US6448744B1Sep 10, 2002
Power factor correction circuit
IBM17 citations84
US7956579B2Jun 7, 2011
Battery charge management system for charging a battery bank that includes a plurality of batteries
IBM10 citations83
US7705488B2Apr 27, 2010
Apparatus, system, and method for a high voltage, high frequency redundant bus power system
IBM16 citations83
US7698585B2Apr 13, 2010
Apparatus, system, and method for reducing idle power in a power supply
IBM17 citations82
US7602623B2Oct 13, 2009
Apparatus, system, and method for a low cost self-healing power supply
IBM11 citations82
US7908505B2Mar 15, 2011
Apparatus, system, and method for event, time, and failure state recording mechanism in a power supply
IBM17 citations81
US5373434ADec 13, 1994
Pulse width modulated power supply
IBM13 citations74
US8054599B2Nov 8, 2011
Apparatus, system, and method for detecting a power system component failure
IBM2 citations63
US7919840B2Apr 5, 2011
Integrated non-isolated VRM and microprocessor assembly
IBM2 citations63
US7826236B2Nov 2, 2010
Apparatus, system, and method for a switching power supply with high efficiency near zero load conditions
IBM5 citations63
US5488551AJan 30, 1996
Pulse width modulated power supply which avoids excessive on-time of switch during start-up
IBM4 citations63
US7759964B2Jul 20, 2010
Apparatus, system, and method determining voltage, current, and power in a switching regulator
IBM4 citations62
US6621180B2Sep 16, 2003
Method and system for maintaining full power during a power interruption in a multiple power supply system
IBM6 citations62
US6373722B1Apr 16, 2002
Power supply system for providing an auxiliary output voltage
IBM6 citations62
US8958220B2Feb 17, 2015
Power-saving voltage converter operation
IBM2 citations61
US8039989B2Oct 18, 2011
Apparatus, system, and method for a low cost multiple output redundant power supply
IBM3 citations61
US8018088B2Sep 13, 2011
Apparatus, system, and method for a synchronous multiple output power supply
IBM2 citations61
US7724487B2May 25, 2010
Apparatus, system, and method for lossless reverse voltage protection
IBM2 citations61
US6097583AAug 1, 2000
Rapid short circuit protection for a multiple output power supply
IBM3 citations61
DISHMAN C CHARLES
3 patentsUS8214165B2Jul 3, 2012
Apparatus, system, and method for precise early detection of AC power loss
DISHMAN C CHARLES9 citations82
US8159160B2Apr 17, 2012
Apparatus, system, and method for improved fan control in a power supply
DISHMAN C CHARLES11 citations82
US8120300B2Feb 21, 2012
Fault tolerant cooling in a redundant power system
DISHMAN C CHARLES7 citations79
AT & T BELL LAB
2 patentsDISHMAN CECIL C
2 patentsDIMARCO ROBERT
2 patentsKOBEDA EDWARD
1 patentShowing the top 50 of 69 patents by PatentIndex Score.