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, 2006
Filed:
Apr. 22, 2004
Motoyasu Kitazawa, Kanagawa, JP;
Yasufumi Suzuki, Kanagawa, JP;
Yasuhiro Tomita, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
A semiconductor device including a tristate buffer circuit, which includes, on an output stage, at least a first transistor (P) for pull-up driving and a second transistor (N) for pull-down driving, in which, when a control signal (EN) is of a value indicating an enable state, an output is set to a high level or to a low level, depending on a data signal, and in which, when the control signal is of a value indicating a disable state, the first and second transistors are turned off to set a high impedance state of the output. The semiconductor device further includes a control unit (, P, P) for performing control for speeding up the transition from the on-state to the off-state of the first transistor (P) at the time of switching the control signal (EN) from the enable state to the disable state.