MICHAEL G MURPHY
Occupational Therapy in Malden, MA
License number
Massachusetts 1545
Issued Date
Nov 13, 1996
Expiration Date
Jan 31, 2004
Type
Occupational Therapist Assistant
Address
Address
Malden, MA 02148
Professional information
Methods And Apparatuses For Receiving And Transmitting Signals
US Patent:
7042952, May 9, 2006
Filed:
Feb 12, 2001
Appl. No.:
09/781459
Inventors:
Michael C. Murphy - Malden MA, US
Assignee:
Custom One Design, Inc. - Melrose MA
International Classification:
H04B 15/00
US Classification:
375258
Abstract:
Circuitry for transmitting signals through a transformer has an output transistor and circuitry which provides a controlled current to and from the output transistor's gate, so as to charge and discharge the gate's parasitic capacitance and increase and decrease the transistor's output current in a controlled manner. Feedback can be used to sense an output signal created by the transistor and turn off current to or from the transistor's gate when the output signal has reached a desired level. The output signal can be the voltage differential produced across an output transformer, and, where the output transformer is center-tapped, it can be the voltage differential across both halves of the center tapped winding.