Raymond M Clemo

US Patent:

6850396, Feb 1, 2005

Filed:

Nov 22, 2000

Appl. No.:

09/721231

Inventors:

Raymond Mathew Clemo - Raleigh NC, US
William Hemena - Raleigh NC, US
Eino Alfred Lindfors - Durham NC, US
Randhir Singh Malik - Cary NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02H 300

US Classification:

361 78, 361 18, 361 90, 361100

Abstract:

Aspects of a fail safe circuit for protecting power supply operation from a failure are described. The fail safe circuit shutdowns at least one power supply when a preset threshold is exceeded and resets to resume normal operation following a temporary fault condition. The fail safe circuit includes a switch coupled to a voltage signal line of a branch of a power supply system, a current sense resistor coupled to the switch for detecting a failure condition in the branch, and a latch coupled to the current sense resistor and the switch for turning the switch off during the failure condition.

US Patent:

7475268, Jan 6, 2009

Filed:

Jan 5, 2006

Appl. No.:

11/325718

Inventors:

Raymond Mathew Clemo - Raleigh NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/30

US Classification:

713340, 713300

Abstract:

The present invention discloses a method for managing voltage supply in multiple linked systems. The method may comprise the steps of connecting a plurality of digital data processing elements and a plurality of power supplies into at least two power domains, each of the domains having at least one processing element and at least two power supplies; monitoring a supply of electrical power to the at least two power domains; sensing a drawn current drawn from associated power supplies; sensing a loss of electrical supply to associated power supplies; and responding to a sensed outage of one of said power supplies by switching power supply for a domain in which there is a sensed outage to another domain which has capacity to support the domain with an outage.

US Patent:

7519843, Apr 14, 2009

Filed:

May 30, 2008

Appl. No.:

12/130986

Inventors:

Jerrod Kimmel Buterbaugh - Wake Forest NC, US
Raymond Mathew Clemo - Raleigh NC, US
Brian Christopher Totten - Durham NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1/08

US Classification:

713322, 713340

Abstract:

A method and system for controlling clocking speed of a processor, is provided. One implementation involves receiving a real-time precision signal representing available power from a power supply output, monitoring said real-time precision signal, and dynamically adjusting the clocking speed of the processor based on the monitored signal for dynamic processor speed throttling based on available power, whereby the processor is clocked at the maximum speed that matches the maximum output power available from the power supply, wherein the processor clock frequency is adjusted up or down continuously to always maximize processor performance based on available power at the system level.

US Patent:

7705488, Apr 27, 2010

Filed:

Dec 28, 2007

Appl. No.:

11/966496

Inventors:

Raymond M. Clemo - Raleigh NC, US
Cecil C. Dishman - Raleigh NC, US
Randhir S. Malik - Cary NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02J 9/00

US Classification:

307 64

Abstract:

An apparatus, system, and method are disclosed for redundant power supplies. A regulator module receives a first power waveform from a first power supply module and a second power waveform from a second power supply module and provides power to a low voltage, regulated output bus. The power waveforms include high voltage, high frequency, chopped power waveforms. The regulator module includes an interleaved power supply stage that receives the power waveforms as pulse-width modulated power signals and converts the first and second power waveforms to the low voltage, regulated voltage on the output bus. The regulator module includes a feedback module that receives a voltage feedback signal from the output bus, adjusts a duty cycle based on the feedback signal, and transmits a drive signal based on the duty cycle to the power supply modules which use the drive signals to generate the first and second power waveforms.

US Patent:

7741736, Jun 22, 2010

Filed:

Oct 9, 2007

Appl. No.:

11/869116

Inventors:

Raymond M. Clemo - Raleigh NC, US
Suzanne M. Michelich - Waukesha WI, US
Sheldon J. Sigrist - Cary NC, US
Jacques B. Taylor - Raleigh NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01H 83/00

US Classification:

307130, 307 31, 361 88

Abstract:

The present invention is a system and method for sensing the voltage at multiple sense points. The present invention acquires optimal feedback from a plurality of sources including those integrated on the same motherboard, for populated or unpopulated connectors and for adapter cards plugged into the connectors, for the purpose of controlling the voltage regulator output. The voltage regulator, connected to a logic system, provides voltage to those connectors needing the voltage.

US Patent:

7948196, May 24, 2011

Filed:

Apr 9, 2008

Appl. No.:

12/099841

Inventors:

Ralph Murray Begun - Raleigh NC, US
Raymond Mathew Clemo - Raleigh NC, US
Karl Klaus Dittus - Durham NC, US
Vinod Kamath - Raleigh NC, US
Michael Sven Miller - Raleigh NC, US
Warren Everett Price - Cary NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1/20
H02P 31/00

US Classification:

318471, 318268, 388934

Abstract:

A system comprising a chassis that includes a plurality of modules and a fan assembly disposed in a distal end of the chassis for drawing air in parallel pathways through the plurality of modules. At least one of the modules is a compute module having a thermal sensor disposed to sense the temperature of air flowing across a processor mounted on a motherboard. The system further comprises a fan controller receiving output from the thermal sensor, wherein the fan controller operates the fan assembly to cool the plurality of modules and maintain the thermal sensor output within an operating temperature range. The fan controller controls the fan speed according to predetermined thermal profile settings associated with one of the compute modules received in the chassis. For example, the predetermined thermal profile settings may include a minimum fan speed, a maximum fan speed, and control loop feedback settings.

US Patent:

7984312, Jul 19, 2011

Filed:

Dec 14, 2007

Appl. No.:

11/956889

Inventors:

Ralph Murray Begun - Raleigh NC, US
Raymond Mathew Clemo - Raleigh NC, US
Brian Gormley - Chapel Hill NC, US
Michael Sven Miller - Raleigh NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1/26

US Classification:

713320, 713300, 713324, 710305

Abstract:

In one embodiment, a single electrical power supply is used to interchangeably power either a single motherboard or dual motherboards. Switchable output power and individual sequencing may be provided to each motherboard using FETs, such that the power supply may respond to the sequencing of each motherboard as if it were dedicated to that motherboard. In a two motherboard system, power to the first motherboard is reduced by removing some output voltages from the first motherboard. Fault circuitry may also be provided so that a power related fault on one domain does not affect operation of the other motherboard.

US Patent:

8020019, Sep 13, 2011

Filed:

May 9, 2008

Appl. No.:

12/118098

Inventors:

Raymond Mathew Clemo - Raleigh NC, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1/26

US Classification:

713340, 307 44, 713300, 714 14

Abstract:

In a data processing system having elements grouped into a plurality of power domains, each one of which has at least one processing element and at least two power supplies, power domains are interconnnected by sensing and switching circuitry which senses the conditions of power supply and demand in and among the domains and switches from one domain to power supplies in another domain in the event of failure in the first domain.