Browse Prior Art Database

Four-State Driver for Memory Testing

IP.com Disclosure Number: IPCOM000051327D
Original Publication Date: 1981-Jan-01
Included in the Prior Art Database: 2005-Feb-10

Publishing Venue

IBM

Related People

Authors:
Abadeer, WW [+details]

Abstract

Testing a data line of a memory to write and read operations usually requires the application of a specified level for some interval of time. To WRITE "1", it is usually required that a level equal to or greater than some specified value be applied for a minimum interval of time, W. To WRITE "0", it is usually required that a level equal to or less than some specified value be applied for the same minimum interval W. For READ operations, a level not to exceed a certain value is normally required. These levels are such that: READ level is greater than WRITE "1" is greater than WRITE "0".