A
Adaptec
A
Active Termination
An active terminator actually has one or more voltage regulators to produce the termination voltage, rather than using resistor voltage dividers.
This is a passive terminator:
/\/\/\/
/\/\/\/ GND
SCSI signal
Notice that the termination voltage is varies with the voltage on the TERMPWR line. One voltage divider (two resistors) is used for each SCSI signal.
An active terminator looks more like this (supply filter caps omitted):
4 0
