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:
Jul. 18, 1989
Filed:
Sep. 18, 1987
Katsuhisa Kubota, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A test system for a random access memory includes a clock pulse width varying unit for varying a pulse width of driving pulses for a random access memory. A first latch is connected to an address input circuit of the random access memory for receiving the output clock signal of the clock pulse width varying unit and latching an address input signal at the leading edge of the output clock signal. A second latch is connected to a data output circuit of the random access memory for latching a data output signal. Both the first and second latches are supplied with the same clock signals from the clock pulse width changing unit, and a comparison unit is connected to a data output circuit of the random access memory for comparing the output of the random access memory with a predetermined expectation value. The output of the comparison unit is latched by the trailing edge of the clock pulse in the second latch.