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. 27, 1987
Filed:
Dec. 11, 1985
Ngu T Pham, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The invention relates to a coincidence gate, whose output only changes state if the inputs are of the same logic level. It has two parallel-connected NOT circuits, each constituted by a transistor, whose source is at earth and the drain supplied by a resistor, the gates constituting the inputs of the gate. The two resistors are identical saturated resistors and the first NOT circuit is supplied from a fixed voltage, whereas the second NOT circuit is supplied across a Schottky diode connected in the forward direction from the point common to the first saturated resistor and to the drain of the first transistor. The point common to the Schottky diode and the second saturated resistor constitutes the output of the coincidence gate. Application to sequential logic circuits.