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:
Jun. 11, 2002
Filed:
Feb. 16, 1999
Applicant:
Inventor:
John S. Petty, Chapel Hill, NC (US);
Assignee:
Ericsson Inc., Research Triangle Park, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/90175 ; H02J 1/10 ;
U.S. Cl.
CPC ...
H03K 1/90175 ; H02J 1/10 ;
Abstract
Apparatus for electrically coupling a first digital device ( ) and a second digital device ( ) includes an interface circuit at the first digital device coupled at an interface node ( ) to the second digital device. The interface circuit is configured to provide a first device supply voltage (Vcc ) to the interface node until a second device supply voltage (Vcc) at the interface node exceeds the first voltage. A data circuit ( ) at the first digital device is coupled to the interface node. The data circuit is responsive to voltage on the interface node for providing digital logic signals at appropriate voltage levels to the second digital device.