The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2000
Filed:
Oct. 14, 1997
Applicant:
Inventor:
Todd Morgan Rasums, Cary, NC (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
710103 ; 710102 ; 713340 ; 714 24 ; 714 36 ;
Abstract
A hot-swap controller for use in an electrical machine (such as a computer) includes a P-ch MOSFET device operatively coupled to a ramp generator and a sensing error amplifier. A negative feedback loop interconnects the positive terminal of the amplifier with the output terminal of the P-ch MOSFET device and the negative terminal of the amplifier is coupled to the ramp generator. The error voltage generated by the amplifier drives the MOSFET device. The controller allows circuit cards to be inserted and/or removed, 'Hot-Plugged', while the machine is operational without causing any deleterious effect on the operation of the machine.