Michael P O'Connor

US Patent:

8426309, Apr 23, 2013

Filed:

Sep 10, 2010

Appl. No.:

12/879400

Inventors:

Jonathan W. Ward - Fairfax VA, US
Michael J. O'Connor - Manassas Park VA, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H01L 21/44

US Classification:

438672, 438199, 438153, 257E2127, 977734

Abstract:

Embodiments of the present invention provide methods for fabricating graphene nanoelectronic devices with semiconductor compatible processes, which allow wafer scale fabrication of graphene nanoelectronic devices. Embodiments of the present invention also provide methods for passivating graphene nanoelectronic devices, which enable stacking of multiple graphene devices and the creation of high density graphene based circuits. Other embodiments provide methods for producing devices with graphene layer segments having multiple thicknesses.

US Patent:

20020161522, Oct 31, 2002

Filed:

Feb 5, 2002

Appl. No.:

10/062555

Inventors:

Clark Cohen - Washington DC, US
David Lawrence - Mountain View CA, US
Stewart Cobb - Palo Alto CA, US
Paul Montgomery - Menlo Park CA, US
Miro Samek - Palo Alto CA, US
Kurt Zimmerman - Mountain View CA, US
Michael O'Connor - Redwood City CA, US
Walter Melton - Columbia MO, US
Gregory Gutt - Lexington Park MD, US

International Classification:

G01C021/36

US Classification:

701/213000

Abstract:

A low-cost, solid-state position sensor system suitable for making precise code and carrier phase measurements in the L1 and L2 bands of GPS uses an ordinary, low-cost OEM card single-frequency carrier phase tracking C/A code receiver and includes low-cost hardware for sensing the L1 and L2 components of GPS carrier phase. Such measurements are suitable for general use in a variety of fields, including surveying. They are also of sufficient quality to be used in controlling heavy machinery, such as aircraft, farm tractors, and construction and mining equipment. A C/A code continuous tracking GPS receiver is used to produce GPS positioning fixes and real-time L1 carrier phase measurements. This C/A code receiver generates timing and reference information for a digital sampling component. This sampling component processes the L1 and L2 signals from the GPS signals in view. A digital signal processing component coupled to this sampling component processes the raw samples in synchronous, batch form including a step to precisely unwrap the P(Y) carrier phase to baseband. The receiver outputs synchronous, carrier phase measurements associated with each ranging source and signal observable. The synchronous raw carrier phase measurements from the continuous tracking C/A code receiver and the digital sampling component may be used to resolve the cycle ambiguities to each ranging source with respect to a reference station at a known location. Within a short interval typically tens of seconds from initial turn on, continuous, synchronous raw measurements are provided by the GPS receiver and processed into precise position fixes.

US Patent:

20030201933, Oct 30, 2003

Filed:

Apr 3, 2003

Appl. No.:

10/405702

Inventors:

Clark Cohen - Washington DC, US
David Lawrence - Mountain View CA, US
Stewart Cobb - Palo Alto CA, US
Paul Montgomery - Menlo Park CA, US
Miro Samek - Palo Alto CA, US
Kurt Zimmerman - Mountain View CA, US
Michael O'Connor - Redwood City CA, US
Walter Melton - Columbia MO, US
Gregory Gutt - Lexington Park MD, US

Assignee:

IntegriNautics Corporation

International Classification:

G01S005/14

US Classification:

342/357120

Abstract:

A low-cost, solid-state position sensor system suitable for making precise code and carrier phase measurements in the L1 and L2 bands of GPS uses an ordinary, low-cost OEM card single-frequency carrier phase tracking C/A code receiver and includes low-cost hardware for sensing the L1 and L2 components of GPS carrier phase. Such measurements are suitable for general use in a variety of fields, including surveying. They are also of sufficient quality to be used in controlling heavy machinery, such as aircraft, farm tractors, and construction and mining equipment. A C/A code continuous tracking GPS receiver is used to produce GPS positioning fixes and real-time L1 carrier phase measurements. This C/A code receiver generates timing and reference information for a digital sampling component. This sampling component processes the L1 and L2 signals from the GPS signals in view. A digital signal processing component coupled to this sampling component processes the raw samples in synchronous, batch form including a step to precisely unwrap the P(Y) carrier phase to baseband. The receiver outputs synchronous, carrier phase measurements associated with each ranging source and signal observable. The synchronous raw carrier phase measurements from the continuous tracking C/A code receiver and the digital sampling component may be used to resolve the cycle ambiguities to each ranging source with respect to a reference station at a known location. Within a short interval typically tens of seconds from initial turn on, continuous, synchronous raw measurements are provided by the GPS receiver and processed into precise position fixes.