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. 24, 2001
Filed:
Apr. 07, 1999
Dale A. Potter, Beaverton, OR (US);
Lattice Semiconductor Corporation, Hillsboro, OR (US);
Abstract
A CMOS OR circuit is fast and has a reduced sensitivity to the variations in the process, temperature and voltage supply. When the input signal to any one of a plurality of select transistor is in a logic high, a fixed supply of current is provided to the common drain terminal of the select transistors thereby to limit the amount of voltage swing of the common drain terminal and the common source terminal of the select transistors. A maximum power sensor senses the voltage differential developed between the common drain and the common source terminals of the select transistors and in response thereto generates a control signal which varies the amount of current that a variable current supply delivers to the common drain terminal thereby to prevent the output signal of the OR circuit from switching to the wrong state.