Gerald A Nelson

US Patent:

6404297, Jun 11, 2002

Filed:

Jul 15, 1999

Appl. No.:

09/354014

Inventors:

Andrew Michael Cherniski - Rescue CA
Gerald J. Nelson - Roseville CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03H 700

US Classification:

333 12, 333182, 361818

Abstract:

An apparatus and a method of electrically filtering unwanted noise signals between a computer sub-system and a power sub-system is disclosed. The computer sub-system and the power sub-system are housed within an electrically conducting housing which includes a partition between the computer sub-system and the power sub-system. The apparatus includes a bus bar connected between the power sub-system and the computer sub-system for providing direct current energy between the power sub-system and the computer sub-system. A dielectric material encompasses the bus bar. An electrically conducting material encompasses the dielectric material and is connected to the electrically conducting housing. A virtual capacitor is thereby formed between the bus bar and the housing, providing a path of least resistance for the unwanted noise signals.

US Patent:

62786245, Aug 21, 2001

Filed:

Dec 1, 1999

Appl. No.:

9/452310

Inventors:

Gerald Jerome Nelson - Roseville CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H02M 3335

US Classification:

363 65

Abstract:

A high availability DC power supply with isolated inputs. The high availability power supply includes a first diode having a first diode output and a second diode having a second diode output. A first isolated direct current power supply is coupled to the first diode. An output power bus defined by the first diode output coupled to the second diode output is provided. The output power bus is still available to supply power upon the loss of the first isolated direct current power supply or the loss of the second isolated direct current power supply.