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:
Sep. 22, 2009
Filed:
Jan. 29, 2008
Yuen H. Chan, Poughkeepsie, NY (US);
Ann H. Chen, Poughquag, NY (US);
Antonio R. Pelella, Highland Falls, NY (US);
Shie-ei Wang, Wappingers Falls, NY (US);
Yuen H. Chan, Poughkeepsie, NY (US);
Ann H. Chen, Poughquag, NY (US);
Antonio R. Pelella, Highland Falls, NY (US);
Shie-ei Wang, Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A high performance, set associative, cache memory tag multiplexer provides wide output pulse width without impacting hold time by separating the evaluation and restore paths and using a wider clock in the restore path than in the evaluation path. A clock controls the evaluation of the input signals. Its leading edge (i.e., rising edge) turns on NR to allow evaluation, its trailing edge (falling edge) turns off NR to stop evaluation. At this point, when NR is shut off, the inputs can start changing to set up for the next cycle. Hence the hold time of the input is determined by the clock trailing edge.