Inventor

FERRAIOLO FRANK DAVID

US32 patents

Patents

32 patents

US7080288B2Jul 18, 2006

Adaptive filtering method and apparatus to compensate for a frequency difference between two clock sources

IBM64 citations94

US5859881AJan 12, 1999

Adaptive filtering method and apparatus to compensate for a frequency difference between two clock sources

IBM78 citations94

US7117126B2Oct 3, 2006

Data processing system and method with dynamic idle for tunable interface calibration

IBM21 citations93

US7116142B2Oct 3, 2006

Apparatus and method for accurately tuning the speed of an integrated circuit

IBM22 citations92

US6671753B2Dec 30, 2003

Elastic interface apparatus and method therefor

IBM16 citations92

US6334163B1Dec 25, 2001

Elastic interface apparatus and method therefor

IBM43 citations92

US6127840AOct 3, 2000

Dynamic line termination clamping circuit

IBM27 citations92

US5651033AJul 22, 1997

Inter-system data communication channel comprised of parallel electrical conductors that simulates the performance of a bit serial optical communications link

IBM24 citations92

US6470458B1Oct 22, 2002

Method and system for data processing system self-synchronization

IBM47 citations91

US6185693B1Feb 6, 2001

Synchronous interface for transmitting data in a system of massively parallel processors

IBM17 citations91

US5838205ANov 17, 1998

Variable-speed phase-locked loop system with on-the-fly switching and method therefor

IBM31 citations91

US6735543B2May 11, 2004

Method and apparatus for testing, characterizing and tuning a chip interface

IBM48 citations90

US6421784B1Jul 16, 2002

Programmable delay circuit having a fine delay element selectively receives input signal and output signal of coarse delay element

IBM53 citations90

US6546530B1Apr 8, 2003

Linear delay element providing linear delay steps

IBM21 citations88

US6192482B1Feb 20, 2001

Self-timed parallel data bus interface to direct storage devices

IBM22 citations88

US5739725AApr 14, 1998

Digitally controlled oscillator circuit

IBM26 citations88

US5832047ANov 3, 1998

Self timed interface

IBM40 citations87

US7813266B2Oct 12, 2010

Self-healing chip-to-chip interface

IBM11 citations84

US6542999B1Apr 1, 2003

System for latching first and second data on opposite edges of a first clock and outputting both data in response to a second clock

IBM14 citations84

US6571346B1May 27, 2003

Elastic interface for master-slave communication

IBM14 citations83

US6762626B1Jul 13, 2004

Phase detector

IBM17 citations81

US6933752B2Aug 23, 2005

Method and apparatus for interface signaling using single-ended and differential data signals

IBM11 citations74

US6442223B1Aug 27, 2002

Method and system for data transfer

IBM9 citations73

US5724008AMar 3, 1998

Phase-locked loop with charge distribution

IBM9 citations72

US5694612ADec 2, 1997

Self-timed interface for a network of computer processors interconnected in parallel

IBM12 citations72

US6922085B2Jul 26, 2005

Comparator and method for detecting a signal using a reference derived from a differential data signal pair

IBM4 citations63

US6711706B2Mar 23, 2004

Method and apparatus for elastic shorts testing, a hardware-assisted wire test mechanism

IBM2 citations63

FERRAIOLO FRANK DAVID

Patents

Method and apparatus for interface failure survivability using error correction

Dynamic wave-pipelined interface apparatus and methods therefor

Self-healing chip-to-chip interface

Fast locking variable frequency phase-locked loop

Method and apparatus for recovering a serial data stream using a local clock

Adaptive filtering method and apparatus to compensate for a frequency difference between two clock sources

Adaptive filtering method and apparatus to compensate for a frequency difference between two clock sources

Data processing system and method with dynamic idle for tunable interface calibration

Apparatus and method for accurately tuning the speed of an integrated circuit

Elastic interface apparatus and method therefor

Elastic interface apparatus and method therefor

Dynamic line termination clamping circuit

Inter-system data communication channel comprised of parallel electrical conductors that simulates the performance of a bit serial optical communications link

Method and system for data processing system self-synchronization

Synchronous interface for transmitting data in a system of massively parallel processors

Variable-speed phase-locked loop system with on-the-fly switching and method therefor

Method and apparatus for testing, characterizing and tuning a chip interface

Programmable delay circuit having a fine delay element selectively receives input signal and output signal of coarse delay element

Linear delay element providing linear delay steps

Self-timed parallel data bus interface to direct storage devices

Digitally controlled oscillator circuit

Self timed interface

Self-healing chip-to-chip interface

System for latching first and second data on opposite edges of a first clock and outputting both data in response to a second clock

Elastic interface for master-slave communication

Phase detector

Method and apparatus for interface signaling using single-ended and differential data signals

Method and system for data transfer

Phase-locked loop with charge distribution

Self-timed interface for a network of computer processors interconnected in parallel

Comparator and method for detecting a signal using a reference derived from a differential data signal pair

Method and apparatus for elastic shorts testing, a hardware-assisted wire test mechanism