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:
Nov. 05, 1991
Filed:
Feb. 08, 1991
Applicant:
Inventors:
Edward J Sackman, Sunrise, FL (US);
Donald L Wray, Sunrise, FL (US);
Assignee:
Racal Data Communications Inc., Sunrise, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3072961 ; 3072966 ; 307310 ;
Abstract
A soft start circuit for hot installation of modules into an active bus. A very low R.sub.ds MOSFET provides bias through its drain to source path from a bus supply. This path is activated by a gate bias network which charges a capacitor from a supply located on the bus. Further control of the module supply is obtained by circuitry which permits addressing of the module to turn it off or on, temperature sensing to provide thermal protection and current sensing to provide short circuit protection.