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:
Oct. 09, 1984
Filed:
Jan. 31, 1983
Liang-Tsai Lin, Scottsdale, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An on-chip memory control circuit generates a proper WRITE STROBE signal for a clock synchronized pipe-line operated integrated circuit memory. A symmetrical clock signal having half the frequency of the system clock is produced by applying the system clock to the C input of a standard master slave delay type flip-flop having its Q output fed back to its D input. A negative going pulse train .phi..sub.P comprising a pulse at every transition of the symmetrical clock is generated by a level change detector which issues a pulse of a desired width whenever a level change at its input is detected. A delayed pulse train .phi..sub.PD is produced by delaying .phi..sub.P an amount which depends on the speed of the memory and other design criteria. The pulse drains .phi..sub.P and .phi..sub.PD are applied to an asynchronous flip-flop, the output of which corresponds to the desired WRITE STROBE signal.