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:
Jul. 01, 2014
Filed:
Jun. 07, 2010
Chandrika Durbha, Dublin, IE;
Edward Cullen, Clane, IE;
Ionut C. Cical, Dublin, IE;
Xilinx, Inc., San Jose, CA (US);
Abstract
A Schmitt trigger inverter circuit can include a first inverter. The first inverter can include a first pull-up device, a first pull-down device and a second pull-down device. The first inverter can receive an input signal. The Schmitt trigger inverter circuit can include a second inverter coupled in series with the first inverter and including an output that generates an output signal. The Schmitt trigger inverter circuit further can include a switch coupled to the output of the second inverter circuit and that is selectively enabled by the output signal. The switch can couple a predetermined reference voltage to a source terminal of the first pull-down device when in an enabled state. Coupling the predetermined reference voltage to the source terminal of the first pull-down device can alter a threshold voltage of the Schmitt trigger inverter circuit.