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. 02, 2008
Filed:
Jan. 20, 2006
Yasuhiko Maki, Kawasaki, JP;
Yasuhiko Maki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An integrated circuit device of the invention, has a memory macro which during normal operation latches an input address in response to a control pulse and generates data output corresponding to the input address, and a test control circuitwhich during testing performs memory macro characteristic tests. A ring oscillator is configured by connecting a prescribed number of stages including one or more memory macro units, having a memory macro and a pulse generation circuit which during testing generates a control pulse for tests in response to an input pulse, and the test control circuit measures the oscillation frequency or period of the ring oscillator.