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:
Aug. 29, 2000
Filed:
Jul. 15, 1998
Applicant:
Inventors:
Gary Paul Powell, Allentow, PA (US);
Ho Trong Nguyen, Allentown, PA (US);
Richard G Stuby, Jr, New Tripoli, PA (US);
Assignee:
Lucent Technologies, Inc., Murray Hill, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
327333 ; 327312 ; 327313 ; 327319 ; 327321 ;
Abstract
The present invention provides an integrated circuit having an operating voltage adaptable buffer, capable of operating in different voltage signaling environments, which includes a control circuit that provides a clamping function to the signaling path under prescribed operating conditions and which also reliably biases the p-type transistor substrate voltage of the buffer to the most positive voltage seen by the buffer under all operating conditions occurring on the signaling path, thereby protecting the p-type transistors.