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:
Jun. 24, 2014
Filed:
Apr. 02, 2012
Liang Wang, Plano, TX (US);
Weibiao Zhang, Plano, TX (US);
Dening Wang, McKinney, TX (US);
John Eric Kunz, Jr., Allen, TX (US);
Liang Wang, Plano, TX (US);
Weibiao Zhang, Plano, TX (US);
Dening Wang, McKinney, TX (US);
John Eric Kunz, Jr., Allen, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An apparatus comprises a first PFET including a first intrinsic body diode; an electrostatic discharge (ESD) subcircuit coupled to a source of the first PFET; a reverse bias voltage element, such as a zener diode, an anode of which is coupled to a gate of the first PFET; a second PFET having a source coupled to a cathode of the zener diode a capacitor coupled to a gate the second PFET; and a first resistor coupled to the gate of the second PFET. The apparatus can protect against both positive and negative electro static transient discharge events.