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:
Feb. 17, 2004
Filed:
Apr. 08, 2002
Andras Szabo, San Jose, CA (US);
Pekka Ojala, Fremont, CA (US);
Exar Corporation, Fremont, CA (US);
Abstract
A method and apparatus for implementing trimming circuits. More particularly, embodiments of the present invention provide a transistor that supplies sufficient current to trim a trimming fuse when the transistor is powered up and after it receives a select signal at its gate. When the trimming fuse is trimmed, it decouples undesired electrical connections in a circuit. Also provided is a delay structure that adds an RC delay to the select signal. The RC delay is of a sufficiently long duration so as to decrease the switching speed of the transistor. The delay structure also provides a pass filter to filter power and voltage spikes in the select signal.