Electrical signal path length measurement for IC testing

摘要

The path length measurement is used to verify that all signal path sections (SS) have the same electrical length using a transmitter and receiver at one end of the latter. The opposite ends of the signal path sections (SS) are short-circuited, with simultaneous emission of a pulse along the signal path sections (SS) and transmission of a central pulse from the short-circuited end to the receiver (E). The point of reception of the control pulse is recorded and entered in a table, with the process repeated for all signal path sections (SS), to provide measurements defining the relative electrical lengths of the signal path sections. Pref. a short-circuit bridge (KB) is used for interconnecting the short-circuit ends of the signal path sections (SS).