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:
Dec. 15, 2009
Filed:
Jan. 08, 2008
Applicant:
Ronald Pasqualini, Los Altos, CA (US);
Inventor:
Ronald Pasqualini, Los Altos, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 19/0175 (2006.01);
U.S. Cl.
CPC ...
Abstract
A CMOS based input buffer suitable for use with PECL or LVPECL voltage levels is described. The input buffer utilizes a differential voltage comparator that employs positive feedback to provide input hysteresis, symmetric headroom and increased noise immunity. In addition, the input buffer can utilize a reference voltage that is substantially constant over process, voltage, and temperature.