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. 06, 2015
Filed:
Sep. 28, 2012
Texas Instruments Incorporated, Dallas, TX (US);
Muhammad Yusuf Ali, Irving, TX (US);
Rajkumar Sankaralingam, Plano, TX (US);
Charles M. Branch, Dallas, TX (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
An inverter type level shifter includes a first power supply voltage and a first ground voltage. A first inverter operates on the first power supply voltage and the first ground voltage to generate a first inverter output. The first inverter includes a first PMOS transistor having a drain coupled to a source of a blocking PMOS transistor and a first NMOS transistor having a drain coupled to a source of a blocking NMOS transistor. The level shifter further includes a second power supply voltage and a second ground voltage, and a second inverter coupled to the first inverter output and operates on the second power supply voltage and the second ground voltage. The blocking PMOS provides the required blocking on the event of the voltage spike in the second power supply voltage w.r.t the first power supply voltage and the blocking NMOS transistor provides the required blocking on the event of the voltage spike in the second ground voltage with respect to the first ground voltage.