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:
Jan. 30, 1996
Filed:
Apr. 06, 1994
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A data output circuit includes a P-channel transistor having a source connected to a supply voltage terminal V.sub.DD and a gate coupled to receive a drive signal from an internal circuit, and an N-channel transistor having its drain connected to the drain of the P-channel transistor and its source connected to an output terminal D.sub.out. The threshold voltage of the N-channel transistor is fixed to be lower than the thresholds of other N-channel transistors formed on the same substrate. A high level signal is output from the output terminal D.sub.out when a voltage output by the supply voltage terminal V.sub.DD is supplied to the output terminal D.sub.out through the P-channel transistor and the N-channel transistor. In this configuration; the output terminal charges quickly using the high driving capability of the N-channel transistor. Since the N-channel transistor is interposed along the current path from the output terminal to the supply voltage terminal, current does not flow from the output terminal to the supply voltage terminal when a voltage higher than the supply voltage is applied to the output terminal.