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. 12, 2016
Filed:
Dec. 29, 2011
Anil Kumar, Clifton Park, NY (US);
Michael A. Nix, Austin, TX (US);
Moises E. Robinson, Austin, TX (US);
Carlin D. Cabler, Austin, TX (US);
Anil Kumar, Clifton Park, NY (US);
Michael A. Nix, Austin, TX (US);
Moises E. Robinson, Austin, TX (US);
Carlin D. Cabler, Austin, TX (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A high voltage protection circuit for a non-tolerant integrated circuit is described herein. A non-tolerant integrated circuit may be a powered down integrated circuit or a low voltage tolerant integrated circuit, that may be exposed to a high voltage source such as an external circuit, device or power supply. The high voltage protection circuit includes a limiting transistor circuit, a control transistor circuit, and an isolation transistor circuit. The limiting transistor circuit limits or holds the voltage at the signal bump to be less than a voltage that can damage the circuit. The isolation transistor circuit disconnects input/output signal circuitry from normal protection circuitry. Both the limiting transistor circuit and the isolation transistor circuit are controlled by the control transistor circuit and are responsive to the power supply voltage being off.