Michael C Trainor

US Patent:

59109564, Jun 8, 1999

Filed:

Nov 5, 1996

Appl. No.:

8/743943

Inventors:

Warren E. Guthrie - Glen Ellyn IL
Michael J. Trainor - Palatine IL

Assignee:

Northrop Gruman Corporation - Los Angeles CA

International Classification:

H04L 2413

US Classification:

370445

Abstract:

A method for generating a random time interval suited for use in defining re-transmission time intervals so as to avoid communication contention utilizes at least one external seed and a plurality of linear maximal sequences. According to one embodiment, a first seed is provided and a first linear maximal sequence is initialized therewith. A second seed is generated via cooperation of the first linear maximal sequence and the external signal. At least one second linear maximal sequence is initialized with the second seed. A new time interval is started when the second linear maximal sequence sequences to a predetermined value.

US Patent:

58724559, Feb 16, 1999

Filed:

May 16, 1997

Appl. No.:

8/857606

Inventors:

Walter Jerry Pohribnij - Palatine IL
Warren E. Guthrie - Wheaton IL
Michael J. Trainor - Palatine IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01R 3102
G08B 2100
H05F 302

US Classification:

324509

Abstract:

Improved electronic circuitry incorporated into a tag attached to a user worn wrist strap of a static electrical discharge dissipation system. The electronic circuitry monitors the electrical connection of the wrist strap from the user to ground and tests the functionality of the tag. The electronic circuitry comprises an oscillator, a signal transmitter, a discharge resistor and a discharge resistor check circuit for monitoring the accuracy of the discharge resistor. The electronic circuitry also comprises a skin resistance check circuit for monitoring the electrical connection of the wrist strap to the user, and a ground fault detect circuit for monitoring the electrical connection of the wrist strap to ground. The electronic circuitry further comprises a testing circuit for checking the frequency of the oscillator, monitoring the spectrum of a signal transmitted by the signal transmitter, checking the functionality of the ground fault detect circuit, checking low and high limits of the discharge resistor, and checking the functionality of the skin resistance check circuit.

US Patent:

58567860, Jan 5, 1999

Filed:

Mar 5, 1997

Appl. No.:

8/812719

Inventors:

Louis R. DiFrancisco - Palatine IL
Scott A. Stratmoen - Arlington IL
Michael James Trainor - Palatine IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G08B 2100

US Classification:

340635

Abstract:

A method is disclosed for controlling operation of a battery powered modem to implement power conservation by adaptive modem sleep. The method comprises detecting the presence of a periodic network timing signal and detecting transition of the modem processor to a processing ready condition, wherein received RF signals can be processed. A processor ready signal is generated in response to detection of the processing ready condition and compared in time to occurrence of the network timing signal. A sleep error signal is generated which represents the interval between occurrence of the network timing signal and the processor ready signal. A modem is then directed into a sleep mode for periods of time sufficient to reduce the sleep error signal to be within a predetermined error budget.