DAVID J COSTA
Electrician in Taunton, MA
License number
Massachusetts 23385
Issued Date
Sep 27, 1976
Expiration Date
Jul 31, 2019
Type
Journeyman Electrician
Address
Address
Taunton, MA 02780
Personal information
See more information about DAVID J COSTA at radaris.comName
Address
Phone
48 Allen Blvd, Swansea, MA 02777
483 S Main St, Raynham, MA 02767
44 Bridge St, Fairhaven, MA 02719
54 Maitland St, New Bedford, MA 02740
569 Lebanon Hill Rd, Southbridge, MA 01550
Professional information
Power Envelope Shaper
US Patent:
6157593, Dec 5, 2000
Filed:
Jan 14, 1999
Appl. No.:
9/252243
Inventors:
David R. Costa - Taunton MA
Seth B. Suppappola - North Kingstown RI
Seth B. Suppappola - North Kingstown RI
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H04B 102
US Classification:
367137
Abstract:
A power envelope shaping device for joining to a serial control output is sclosed. Multiple power switcher modules are joined to a plurality of incremental power sources and controlled by the power select circuitry module. In this way, each power switcher module can provide power from at least one of the incremental power sources on command from said power select circuitry module. The power switcher module outputs are joined together in order for providing varying power levels in accordance with a preprogrammed power envelope shape.
Echo Simulator For Active Sonar
US Patent:
5828625, Oct 27, 1998
Filed:
Oct 9, 1997
Appl. No.:
8/954884
Inventors:
David R. Costa - Taunton MA
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H04B 1700
US Classification:
367 13
Abstract:
A target echo simulator with reverberation and ambient noise for testing an ctive sonar system. A transmit enable pulse from a sonar transmitter establishes a sequence of operations in which a target echo generator, reverberation generator and ambient noise generator produce a composite signal. The target echo generator produces a pulse modulated output pulse of a characteristic sonar frequency. The reverberation generator produces an amplitude modulating or envelope controlled output at a frequency of a carrier that is offset from the target echo carrier frequency. An ambient noise generator constantly produces ambient noise. A summing amplifier combines the generated signals to produce a composite signal for transfer to a receive connection on the active sonar system.