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. 11, 2022
Filed:
Jan. 17, 2020
Nxp Usa, Inc., Austin, TX (US);
Hector Sanchez, Austin, TX (US);
Gayathri Bhagavatheeswaran, Austin, TX (US);
NXP USA, Inc., Austin, TX (US);
Abstract
Disclosed is a control circuit for protecting MOSFETs in I/O buffers or other devices from overvoltage damage, especially during power ramp up. The control circuit can perform additional functions. In one embodiment an integrated circuit (IC) includes input/output (I/O) buffers coupled to an output supply voltage terminal that is configured to receive an output supply voltage Vddio. Each of the I/O buffers has a bias voltage generator that is configured to generate a first bias voltage with a magnitude that depends on a control signal; an output stage that receives the first bias voltage, wherein the output stage is configured to drive an I/O pad based upon a data signal received at the I/O buffer. The IC also includes an I/O buffer controller coupled to the I/O buffers and configured to generate the control signal based upon a magnitude of the output supply voltage Vddio.