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. 12, 2002
Filed:
Jul. 02, 1999
Paul H. Ouyang, San Jose, CA (US);
Joseph W. Ku, Palo Alto, CA (US);
Donald Liusie, San Jose, CA (US);
Dmel, Inc., Santa Clara, CA (US);
Abstract
Current protection circuit has a comparator having a first terminal coupled to a reference voltage, a second terminal coupled to an output node, and an output for providing a control signal based on the inputs. Current protection circuit also has a transistor having a drain electrode coupled to a first predetermined voltage, a gate electrode, and a source electrode coupled to the output node. The transistor includes a current path between the drain electrode and the source electrode for conducting an amount of current that is dependent on the voltage applied to the gate electrode. Current protection circuit also has a fold-back circuit having a first input coupled to the output node for detecting changes in the output voltage, a second input coupled to the output of comparator for receiving the control signal, and a third input for selectively changing the voltage applied to the gate electrode based the control signal and the changes in the output voltage.