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:
Apr. 14, 2009
Filed:
Dec. 15, 2006
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 ...
H03L 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power-on reset circuit includes a trigger circuit that indicates when a power supply has been turned on, and when the supply has reached a voltage level that is sufficient for normal chip operation. For chips that contain a crystal oscillator, the power-on reset circuit also includes logic that determines the duration of the crystal warm-up delay.