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:
Aug. 11, 2009
Filed:
Dec. 23, 2004
Peter H. Alfke, Los Altos Hills, CA (US);
Peter H. Alfke, Los Altos Hills, CA (US);
XILINX, Inc., San Jose, CA (US);
Abstract
Circuit and methods for testing a memory device are disclosed. According to one aspect of the invention, a circuit for testing an asynchronous data transfer comprises a first circuit receiving a stream of data in response to a clock signal in a first clock domain. A second circuit coupled to the first circuit receives the stream of data from the first circuit in response to a low level of an empty signal in the second clock domain. A comparator circuit coupled to receives the stream of data and the output of the second circuit. Specific applications to dual port RAMs as well as implementations in a programmable logic devices are disclosed. Various methods of testing an asynchronous data transfer are also disclosed.