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:
Oct. 01, 2002
Filed:
Apr. 11, 2001
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/716 ;
U.S. Cl.
CPC ...
H03K 1/716 ;
Abstract
An output buffer ( ) has a pre-driver circuit ( ) for controlling a voltage transition of an output signal from an output driver transistor ( ). The pre-driver circuit ( ) provides an input that slightly leads the gate voltage of the output driver transistor ( ). The pre-driver circuit ( ) includes a configurable resistance circuit ( ) that provides one resistance value at the start of a signal transition and provides another resistance value near the end of the signal transition. A threshold detector ( ) senses a voltage level of the input signal and switches from one resistance value to the other resistance value when the input signal crosses a predetermined voltage.