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:
Oct. 27, 2015
Filed:
Nov. 30, 2012
Xinghai Tang, Cedar Park, TX (US);
Hector Sanchez, Cedar Park, TX (US);
Xinghai Tang, Cedar Park, TX (US);
Hector Sanchez, Cedar Park, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
An IC includes: a substrate having a thick oxide portion and a thin oxide portion; a load circuit disposed on the thin oxide portion and coupled between a supply node and a virtual supply node; and a current source circuit and protection circuit disposed on the substrate. The current source circuit has an output coupled to the virtual supply node and is operable to provide a voltage at the virtual supply node. The protection circuit includes a sensing portion and a protection portion. The sensing portion is coupled to the virtual supply node and is operable to detect the voltage at the virtual supply node. The protection portion is coupled to the sensing portion and is operable, in response to the sensed voltage, to prevent a difference in voltage between the voltage at the virtual supply node and a second voltage at the supply node from exceeding a maximum voltage.