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:
Apr. 09, 2002
Filed:
Jul. 27, 2000
Farshid Shokouhi, San Jose, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
A high voltage level-shifter that facilitates the conversion of typical positive logic input signal voltages to non-positive (i.e., at or below ground) output signal voltages. The high voltage level-shifter is separated into two voltage shifting circuits that are connected in parallel between a circuit input terminal and a circuit output terminal. The first voltage shifting circuit includes an isolation switch (e.g., a pass transistor) connected between a positive voltage source and a positive supply rail of an output driver. The negative supply rail of the output driver is connected to one of the non-positive voltage sources. An output control circuit controls the isolation switch to couple the positive voltage source to the positive supply rail of the output driver only when the negative voltage source is driven onto the circuit output terminal (i.e., in response to a logic “1” input signal).