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:
Feb. 13, 2001
Filed:
Sep. 17, 1999
Tadao Aikawa, Kawasaki, JP;
Yasuharu Sato, Kawasaki, JP;
Hiroyuki Kobayashi, Kawasaki, JP;
Waichirou Fujieda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A data output circuit for a semiconductor memory device, such as a synchronous DRAM (SDRAM) includes an output control circuit that acquires a command in sync with an input internal clock signal and generates an output control signal used to determine the output timing of a data signal. An output buffer receives the output control signal and then outputs the data signal in accordance with an output internal clock signal. The phase of the output internal clock signal is advanced from that of the input internal clock signal. The output control circuit also includes a latency counter that generates the output control signal by counting the cycles of a second output internal clock signal, which is delayed from the first output internal clock signal.