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. 12, 1995
Filed:
Jan. 31, 1994
Michael C Stephens, Jr, Stafford, TX (US);
Vipul C Patel, Sugar Land, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A method and apparatus for testing the self-refresh operation of a dynamic memory part are provided in which an oscillator (140) is coupled to a self-refresh counter (142). The self-refresh counter (142) causes a refresh row address counter (144) to generate row addresses for self-refresh cycles. The refresh row address counter (144) is coupled to a self-refresh control circuit (148). The self-refresh control circuit (148) is operable to generate a signal indicating completion of a self-refresh cycle. The refresh row address counter (144) is also coupled to a multiplexer (146). The multiplexer (146) outputs row addresses from either the refresh row address counter (144) or those supplied externally for rows to be refreshed.