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. 23, 1999
Filed:
Jul. 08, 1997
Shozo Tomita, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
There is provided an address decoder which allows a high-speed operation without causing a malfunction. When a pre-charge signal is in a state of being set at a logical level of '0', an address driver is brought into a state of being held at '1'. When the pre-charge signal is in a state of being set to a logical level '1', the address driver outputs a drive signal pair which becomes positive phase and negative phase of an address signal to each of the drive signal lines. A detection circuit is connected to each signal line of at least one drive signal pair among a plurality of signal pairs at an end portion of the signal lines on the side opposite to the address driver. The decoding circuits all have the same circuit structure. Eight input terminals are connected to either one of the signal lines and are uniformly disposed along the drive signal lines. When the detection circuit monitors the change of either one of the signal lines connected thereto to '0' and detects determination of the input drive signals in the decoding circuit, a control circuit receives an outputted detection signal and changes the enable signal to '0' so as to be brought into a decode-enabled state.