Kenneth A Wallace

US Patent:

60522984, Apr 18, 2000

Filed:

Mar 3, 1999

Appl. No.:

9/261783

Inventors:

Kenneth Andrew Wallace - Lewis Center OH
Gueorgui I. Mantov - Lexington OH

Assignee:

Peco II, Inc. - Galion OH

International Classification:

H02M 324

US Classification:

363 95

Abstract:

A noise suppression circuit for use with a DC/DC converter having an output and an input responsive at least in part to the output of the converter is provided. The noise suppression circuit includes multiple parallel feedback loops, wherein the first feedback sets the steady state nominal output voltage, the second feedback loop prevents the output voltage from exceeding a predefined high voltage level, and the third feedback loop prevents the output voltage from decreasing below a predefined low voltage level. In some embodiments, the first, second, and third feedback loops comprise a operational amplifier, a diode, and an internal feedback loop, wherein the internal feedback loops of each of these loops share a common node. The common node configuration provides the circuit with quick transitions between output voltage states and dynamic regulation of the DC/DC converter output voltage.

US Patent:

57540888, May 19, 1998

Filed:

Nov 17, 1994

Appl. No.:

8/342057

Inventors:

David Robert Fletcher - Coldwater, CA
John Michael Gallagher - London, CA
Terry Chester Lahr - Friendsville PA
Garey George Roden - Apalachin NY
James Jens Hansen - Huntington IN
Kenneth Andrew Wallace - Lewis Center OH

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01F 500

US Classification:

336200

Abstract:

A planar transformer wherein a conformal dielectric epoxy composition is provided on the planes containing the primary and secondary windings to encapsulate the windings and to insulate the windings from the perimeter of each plane to prevent the primary windings from electrically contacting the secondary windings around the edges of the planes. Also, a conformal dielectric epoxy composition separates the plane with the primary windings from the plane with the secondary windings from primary and secondary circuits directly and below windings.

US Patent:

57931917, Aug 11, 1998

Filed:

Sep 22, 1997

Appl. No.:

8/934568

Inventors:

Michael Shane Elmore - Endicott NY
Kenneth Andrew Wallace - Lewis Center OH

Assignee:

Celestica, Inc. - Toronto

International Classification:

G05F 140
H02M 700

US Classification:

323272

Abstract:

A composite power supply comprises a master ZVS power supply and a slave ZVS power supply. Using a phase lock loop circuit, the composite power supply detects a phase relationship between switching of the first switch and switching of the second switch, and adjusts timing of switching of the second switch if the first switch and the second switch are not being switched at a predetermined phase relationship with each other. The outputs of the two power supplies are connected together. Thus, the master power supply contributes approximately half the output power and precision control on the output/load voltage while the slave power supply contributes approximately half the output power.

US Patent:

59630787, Oct 5, 1999

Filed:

Jan 26, 1998

Appl. No.:

9/013132

Inventors:

Kenneth Andrew Wallace - Lewis Center OH

Assignee:

Peco II, Inc. - Galion OH

International Classification:

H03K 1760

US Classification:

327432

Abstract:

A FET drive circuit is disclosed. The disclosed drive circuit develops a unipolar voltage from a bi-polar source voltage and facilitates fast turn-off of the driven FET. Preferably, the drive circuit includes a first diode having a first reverse recovery time, a transistor, and a second diode having a second reverse recovery time which is longer than the first reverse recovery time.

US Patent:

47273089, Feb 23, 1988

Filed:

Aug 28, 1986

Appl. No.:

6/901350

Inventors:

Robert J. Huljak - Nicholasville KY
Stephen F. Newton - Winchester KY
Kenneth A. Wallace - Lexington KY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02M 3137

US Classification:

323222

Abstract:

A DC to DC power converter having reduced switching loss for operation at high frequencies. As disclosed, a buck, or forward, converter includes a first FET as the switching device in series with an inductor and a second FET as the flywheel device. At the common node to which the two FET's and the inductor are connected, there is sufficient capacitance that the FET's may be turned off without appreciable voltage change across the FET's. The value of the inductor is chosen, with respect to the input and output voltages and frequencies of operation involved, to insure that the inductor current polarity reverses each cycle, raising the node voltage to the level of the input voltage, substantially eliminating turn-on losses of the first FET. Control circuitry is provided for regulation of the power converter to control the peak-to-peak current in the inductor and to insure that at least a selected minimum value of the inductor current is present for each cycle of operation of the converter. An over-voltage protection circuit for the output of the converter is also provided.

US Patent:

61186805, Sep 12, 2000

Filed:

May 28, 1999

Appl. No.:

9/322726

Inventors:

Kenneth Andrew Wallace - Lewis Center OH
Gueorgui I. Mantov - Lexington OH
Jon Drew Karnes - Galion OH
John Roller - Galion OH

Assignee:

PECO II - Galion OH

International Classification:

H02M 700

US Classification:

363 71

Abstract:

Methods and apparatus are disclosed for achieving load balance between parallel inverters in an AC power supply. Load balancing reduces undesirable cross conduction current between the parallel inverters. Load balancing and the resulting reduction in cross conduction current are achieved without the need for common control circuitry between the parallel inverters. Thus, the single-fault protection offered by redundant parallel inverters is not compromised by the disclosed load balancing techniques.

US Patent:

59333383, Aug 3, 1999

Filed:

Oct 14, 1997

Appl. No.:

8/949874

Inventors:

Kenneth Andrew Wallace - Lewis Center OH

Assignee:

Peco II, Inc. - Galion OH

International Classification:

H02M 318

US Classification:

363 61

Abstract:

A rectifying circuit comprising first and second current doublers is disclosed. In some embodiments, the first and second current doublers are connected in series. In other embodiments, the current doublers are connected in parallel. In phase pairs of inductors can share a common core to reduce parts and ensure voltage balance.

US Patent:

20150248387, Sep 3, 2015

Filed:

Jul 29, 2014

Appl. No.:

14/121081

Inventors:

William E. Mattingly - Chicago IL, US
Kenneth Arthur Wallace - Windermere FL, US

International Classification:

G06F 17/24
G09G 5/377
H04L 29/08
G06Q 50/18

Abstract:

This application is for an electronic annotation system for annotating (by text, picture, or video) electronic digital content and sharing the annotations as an account owner with third parties without violating any copyrights of the digital content owner. Rather than sharing the electronically annotated digital content with third parties, only an overlay with the electronic annotation is shared with third parties as an account owner. The third parties must have their own legally obtained copy of the digital content. The third parties can open the annotation and independently access the underlying digital content, thereby spatially integrating the two on the third parties' computer screens.

Address:

272 W Central Ave, Delaware, OH 43015

VIN:

1GNDT13S672198150

Make:

CHEVROLET

Model:

TRAILBLAZER

Year:

2007

Address:

2878 Atoll Dr, Lewis Center, OH 43035

VIN:

2FMDK39C97BA80185

Make:

FORD

Model:

EDGE

Year:

2007