| 摘要 |
<p>In particular in automatic testing equipment for integrated circuits, all signal sections at the test piece joint should ideally be of the same electrical length. The signal sections used in the test consist, in the case of reception, of cable, comparator, error logic, etc. If the signal sections are of different electrical durations, then in the case of reception, the transmitted signal must be connected. In a process for determining the electrical duration of signal sections, each of which has a transmitter and a receiver and at the end connecting points for example for an integrated circuit, the connecting points (AS) of all signal sections (SS) are short-circuited, all receivers up to the receiver of the signal section to be measured are then switched off, all transmitters up to the transmitter of the signal section to be measured are switched on and simultaneously emit a pulse which is transmitted to the connecting point. At the short-circuited connecting points (AS) of the signal sections (SS), a central pulse (21) is then produced which is transmitted over the signal section to be measured to its receiver (E). The time at which the pulse produced by the central pulse enters the receiver (E) is recorded and entered in a table. The above-mentioned process is carried out for all signal sections. The measurements so obtained give the relative durations of the various signal sections. The process for determining the duration of signal sections requires only that the connecting points of the signal sections be connected with one another through a short-circuit bridge (KB).</p> |
