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. 27, 2004
Filed:
Jan. 09, 2002
Charles A. Cornell, Austin, TX (US);
Mathew S. Berzins, Austin, TX (US);
Steven P. Larky, Del Mar, CA (US);
Cypress Semiconductor Corp., San Jose, CA (US);
Abstract
A clock may be combined with an asynchronous RAM to create an asynchronous RAM that works within a subset of a full clock period, but allows the address access and other internal RAM functions to occur throughout the clock period. The present invention simplifies the timing analysis of the logic path through the RAM, increases the clock frequency of the resulting logic (compared to a synchronous RAM with narrow timing window), reduces the current requirements (compared to asynchronous RAM), and allows the combinatorial logic to be changed late in the design cycle without the need for a RAM redesign. As more and more logic is synthesized and internal RAM is used to put increasing function on the same die, the structure of the present invention meshes well with synchronous synthesized logic design methodologies, while at the same time recognizes the need to be as stingy as possible with operating current.