PETER J BROWN
Broker in Springfield, MA

License number
Massachusetts 82537
Issued Date
Mar 1, 1973
Expiration Date
Aug 30, 2002
Type
Broker
Address
Address
Springfield, MA 01104
LicenseFiles verified this license of Nov 25, 2016 at the Mass.gov - Consumer Affairs and Business Regulation.

Professional information

Peter Brown Photo 1

Software/Music/Mathematics
Position:
Information Systems Engineer at University of Massachusetts Amherst, Keyboardist at Alive She Cried, Keyboardist at Moose and the Hightops
Location:
Springfield, Massachusetts Area
Industry:
Higher Education
Work:
University of Massachusetts Amherst - Administrative & Finance Systems/Parking Services since Aug 2011 - Information Systems Engineer Alive She Cried - South Hadley, MA since 2009 - Keyboardist Moose and the Hightops since 2009 - Keyboardist Boston University Oct 2010 - Aug 2011 - Software engineer University of Massachusetts Oct 2003 - Oct 2010 - Software Developer/Systems Manager University of Massachusetts/Amherst 1998 - 2003 - Senior Software Engineer Artios Corporation 1995 - 1998 - Software Engineer Université de Sherbrooke 1994 - 1995 - Postdoctoral Fellow Boston College 1993 - 1994 - Visiting Assistant Professor
Education:
Syracuse University 1986 - 1993
Ph.D., Mathematics

Peter Brown Photo 2

High Speed Optoisolator Switching Apparatus

US Patent:
5089948, Feb 18, 1992
Filed:
Jun 29, 1990
Appl. No.:
7/546117
Inventors:
Peter J. Brown - Springfield MA
Suresh Hariharan - Orchard Park NY
Assignee:
Digital Equipment Corporation - Maynard MA
International Classification:
H03K 508
US Classification:
363 58
Abstract:
An electrically isolated high speed optical switching arrangement for use as a computer over-voltage sensing circuit utilizing first and second optoisolator devices, the first having an input, a first signal from the output of a bus sensing circuitry which provides two complementary outputs, with the output voltage of the optoisolator controlling power-down circuitry for the computer in response to an over-voltage condition. A second control optoisolator has its output in parallel with a resistor in the base to emitter path of the first optoisolator. The complementary signal of the bus-sensing circuitry provides the input to the second optoisolator. During normal power conditions, the first optoisolator is conductive and the second is non-conductive. As an over-voltage condition occurs, the second optoisolator is driven into conduction, thereby effectively providing a shunt across the resistor of the first optoisolator while the first optoisolator is shut off to instantaneously terminate conduction of the first optoisolator and provide an output signal to the power-down circuitry for shutting down the power in response to the over-voltage condition.

Broker licenses in Massachusetts