DR. DAVID MICHAEL GOODMAN, MD, MPH
Medical Practice at Duke Medicine Cir, Durham, NC
License number
North Carolina 2015-01086
Category
Medical Practice
Type
Obstetrics & Gynecology
Address
Address
40 Duke Medicine Cir, Durham, NC 27710
Phone
(919) 668-0296
(919) 668-5547 (Fax)
(919) 684-8111
(919) 668-5547 (Fax)
(919) 684-8111
Professional information
Selective Connection Of Power Supplies
US Patent:
4812672, Mar 14, 1989
Filed:
Oct 1, 1987
Appl. No.:
7/103200
Inventors:
Michael L. Cowan - Cary NC
David C. Goodman - Durham NC
David C. Goodman - Durham NC
Assignee:
Northern Telecom Limited - Montreal
International Classification:
H02J 906
US Classification:
307 64
Abstract:
A circuit for selectively connecting or disconnecting one of two power supplies, connected in parallel, in the event of the failure of one of the power supplies. The mechanism used is a MOSFET inserted "backwards" in a control circuit such that when the MOSFET is turned "off" no current drain is permitted through the diode internal to the MOSFET. Such a method provides fast switching and may be employed in other circuits as a replacement for relays.
Dr. David M Goodman, Durham NC - MD (Doctor of Medicine)
Specialties:
Obstetrics & Gynecology
Age:
42
Address:
7305 Calibre Park Dr STE 108, Durham 27707
(336) 407-3096 (Phone)
Medical Center Blvd, Winston Salem 27157
(336) 713-5630 (Phone), (336) 713-9655 (Fax)
WAKE FOREST PHYSICIANS DEPARTMENT OF GYNECOLOGY
500 Shepherd St STE 200, Winston Salem 27103
(336) 716-4039 (Phone), (336) 716-6961 (Fax)
(336) 407-3096 (Phone)
Medical Center Blvd, Winston Salem 27157
(336) 713-5630 (Phone), (336) 713-9655 (Fax)
WAKE FOREST PHYSICIANS DEPARTMENT OF GYNECOLOGY
500 Shepherd St STE 200, Winston Salem 27103
(336) 716-4039 (Phone), (336) 716-6961 (Fax)
Languages:
English