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:
Mar. 15, 1994
Filed:
Apr. 13, 1992
Takaki Kohno, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A dynamic random access memory device is equipped with an output data buffer circuit for driving an output data pin, and the output data buffer circuit comprises an output inverter coupled with the data pin, a driving unit responsive to a data bit on a data line pair in the absence of a high-impedance control signal for controlling the output inverter, the driving unit being further operative to cause the output inverter to enter high-impedance state in the presence of the high-impedance control signal, and a switching transistor coupled between the data pin and a constant voltage source and responsive to a preceding signal for coupling the output data pin with the constant voltage source, wherein the high-impedance control signal and the preceding signal are supplied to the output data buffer circuit before reaching the data bit thereto so that power voltage lines are prevented from voltage fluctuation without sacrifice of switching speed.