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:
May. 23, 1989
Filed:
Apr. 21, 1988
Seiichi Hannai, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
For elimination of mis-decoding operation, there is disclosed a decoder unit comprising a logic gate having input nodes respectively supplied with data bits of an input signal and carried out a logical operation to decide a logic level at an output node thereof, a precharging transistor responsive to a precharging signal and providing a conduction path between a source of positive voltage and the output node of the logic gate for charging the output node of the logic gate to a positive precharging level, an output circuit responsive to the logic level at the output node of the logic gate for producing an output signal, and a compensating transistor responsive to the voltage level at the output node of the logic gate and operative to provide a conduction path between the output node of the logic gate and the source of positive voltage, so that the compensating transistor allows an excess voltage to be discharged from the output node to the source of positive voltage, thereby preventing the decorder unit from the mis-decoding operation due to the excess voltage level at the output node of the logic gate.