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. 10, 1998
Filed:
Jan. 07, 1997
Applicant:
Inventors:
Yasuyuki Okamoto, Hyogo, JP;
Ryuichi Matsuo, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365233 ; 36518905 ;
Abstract
An input circuit 200 includes first to fourth switching transistors T1-T4 to be controlled by clock signals CLK and /CLK, and two latch circuits 202 and 204. In response to a rising edge of the clock signal, switching transistor T1 is turned on, and latch circuit 202 takes in data. In response to a falling edge of clock signal CLK, switching transistor T3 is turned on, and latch circuit 204 takes in the data. Since input and output of the data are performed at both the rising edge and the falling edge of the clock signal, the operation can be performed at double the frequency.