Paul Louis Walker

US Patent:

8250751, Aug 28, 2012

Filed:

Feb 20, 2008

Appl. No.:

12/070811

Inventors:

Rajwant Sidhu - Brea CA, US
Paul Walker - Yorba Linda CA, US

Assignee:

DDi Global Corp. - Anaheim CA

International Classification:

H01K 3/10

US Classification:

29852, 29847, 29832, 174262

Abstract:

Printed circuit boards have circuit layers with one or more copper filled through-holes and methods of manufacturing the same. An aspect of an embodiment of the present invention enhances thermal characteristics of filled through-holes of printed circuit boards to provide extra reliability to the printed circuit boards. In one embodiment, a printed circuit broad has a plurality of through-holes to connect copper patterns on different layers of the printed circuits broad. Here, at least one of the through-holes is copper plated closed at both ends with at least 70% volume of the through-hole plated with copper to, e. g. , enhance thermal characteristics of the through-hole, thereby providing extra reliability to the printed circuit board. In one embodiment, the printed circuit board includes a surface conductor (or cap) that is directly plated over the copper filled barrel plated through-hole.

US Patent:

20130118042, May 16, 2013

Filed:

Nov 11, 2011

Appl. No.:

13/294239

Inventors:

James R. Keys - Pleasanton CA, US
Paul A. Walker - Pleasanton CA, US

International Classification:

G09F 3/00
G06F 3/048

US Classification:

4029901, 715810

Abstract:

An apparatus, computer-implemented method for customizing an apparatus, and system for customizing an apparatus are disclosed. A user interface may allow a user to define content for customizing a selected apparatus. Based on the selected apparatus and the user-defined content, a label may be created that can be applied to the apparatus by a user. In this manner, an apparatus may be customized by applying and/or reapplying a label with user-defined content.

US Patent:

20130220675, Aug 29, 2013

Filed:

Aug 27, 2012

Appl. No.:

13/594971

Inventors:

Rajwant Sidhu - Brea CA, US
Paul Walker - Yorba LInda CA, US

International Classification:

H05K 1/11
H05K 1/02

US Classification:

174252, 174257

Abstract:

Printed circuit boards have circuit layers with one or more copper filled through-holes and methods of manufacturing the same. An aspect of an embodiment of the present invention enhances thermal characteristics of filled through-holes of printed circuit boards to provide extra reliability to the printed circuit boards. In one embodiment, a printed circuit broad has a plurality of through-holes to connect copper patterns on different layers of the printed circuits broad. Here, at least one of the through-holes is copper plated closed at both ends with at least 70% volume of the through-hole plated with copper to, e.g., enhance thermal characteristics of the through-hole, thereby providing extra reliability to the printed circuit board. In one embodiment, the printed circuit board includes a surface conductor (or cap) that is directly plated over the copper filled barrel plated through-hole.

US Patent:

20130227481, Aug 29, 2013

Filed:

Apr 3, 2013

Appl. No.:

13/855941

Inventors:

Brita LP - , US
Paul A. Walker - Pleasanton CA, US

Assignee:

Brita LP - Oakland CA

International Classification:

G06F 3/0482

US Classification:

715810

Abstract:

An apparatus, computer-implemented method for customizing an apparatus, and system for customizing an apparatus are disclosed. A user interface may allow a user to define content for customizing a selected apparatus. Based on the selected apparatus and the user-defined content, a label may be created that can be applied to the apparatus by a user. In this manner, an apparatus may be customized by applying and/or reapplying a label with user-defined content.

US Patent:

49422871, Jul 17, 1990

Filed:

Jun 19, 1989

Appl. No.:

7/367885

Inventors:

Paul Walker - Corona CA

International Classification:

H05B 358

US Classification:

219385

Abstract:

A linoleum roll heater assembly for heating a roll of linoleum while in storage or at a job site located at a cold weather environment. The heater assembly includes a heater tube to be received through the roll of linoleum to be heated. The heater tube is supported for rotation between a pair of side support blocks to facilitate unrolling and dispensing the heated linoleum. An insulating and heating cover or blanket is removably wrapped around the linoleum roll to prevent the escape of heat. The linoleum roll is uniformly heated by respective heating elements of the heater tube and the heating blanket, whereby linoleum may be continuously disposed from its roll with the expenditure of a minimal pulling force.

US Patent:

60053631, Dec 21, 1999

Filed:

Nov 6, 1998

Appl. No.:

9/187020

Inventors:

James Aralis - Mission Viejo CA
Paul Walker - Tustin CA

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G06J 100
G11B 509

US Classification:

318560

Abstract:

An apparatus for Position Error Signal (PES) measurement in a disk drive servo system includes a variable-gain amplifier that receives an analog servo signal; a multiplier coupled to the variable-gain amplifier; a low-pass filter coupled to the multiplier; a digital-to-analog converter; an analog summer that is coupled to the low-pass filter and to the digital-to-analog converter; an analog-to-digital converter coupled to the analog summer; a digital summer coupled to the analog-to-digital converter, and a phase-locked loop that provides timing signals to the multiplier, the digital-to-analog converter and the analog-to digital converter. The invention enables an output of the variable-gain amplifier to be multiplied with the clocking signal of the phase-locked loop. The multiplication output signal is then filtered by the low-pass filter. The output of the low-pass filter is summed with voltage ramp signals that are generated by the digital-to-analog converter and the resulting signals are converted to a series of 6-bit words by the digital-to-analog converter.

US Patent:

20170141685, May 18, 2017

Filed:

Nov 9, 2016

Appl. No.:

15/346820

Inventors:

- Aliso Viejo CA, US
Sunny Joel - Hyderabad, IN
Paul Walker - Mission Viejo CA, US

International Classification:

H02M 3/158

Abstract:

A hysteretic power converter constituted of: a switched mode power supply comprising an inductor, an electronically controlled switch and an output capacitor, the switch arranged to alternately open and close a loop with the inductor and a power source; a hysteretic comparator, a first input coupled to a feedback connection and arranged to receive from the feedback connection a feedback signal providing a first representation of the voltage across the output capacitor, the electronically controlled switch opened and closed responsive to an output of the hysteretic comparator; a reference voltage source arranged to generate a reference voltage, the generated reference voltage coupled to a second input of the hysteretic comparator; and a voltage coupler, the voltage coupler arranged to couple a second representation of the voltage across the output capacitor to the second input of the hysteretic comparator, such that the second representation is added to the generated reference voltage.