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:
Jan. 22, 2008
Filed:
Dec. 22, 2005
David Reid, Sydney, AU;
David Reid, Sydney, AU;
Integrated Device Technology, Inc., San Jose, CA (US);
Abstract
An over-voltage tolerant input stage in a semiconductor device is disclosed. The input stage includes: an input pad for receiving an input signal to the semiconductor device, a buffer coupled to the input pad for buffering the input signal, a pullup circuit for limiting current in the input signal, a switching circuit coupled to the input pad for controlling the pullup circuit, and a voltage supply coupled to the input pad, the pullup circuit and the switching circuit. In operation, the switching circuit is enabled to cause the pullup circuit to stop current flow between the input signal and voltage supply in the event of an over-voltage condition.