Leistungsstarke Stromimpulsansteuerungs-Abschlußeinrichtung für eine Signalleitung

A terminator apparatus used with a SCSI bus line controls the voltage level of a notch occurring in data and/or control signals transferred on the bus line. The terminator apparatus includes a termination network, a current switching device, and a programmed monitoring circuit. The termination network generates a first current. The current switching device generates a second current. The monitoring circuit controls a programmed length of time that the second current is generated. The current switching device is responsive to the monitoring circuit for disconnecting the second current when the programmed length of time has been exceeded. The second current serves to raise the voltage level of the notch occurring in the signal lines when they are deasserted so as to prevent erroneous data from being transferred.