Types of Terminators
- Passive
Passive terminators consist of a simple resistor. Limited usage for highspeed applications. There are two types: a resistor between signal and ground like in Ethernet, or a resistor from the positive rail to signal and a resistor from the signal to negative rail like in SCSI.
- Active
Active terminators consist of a voltage regulator that keeps the voltage used for the terminating resistor(s) at a constant level.
- Forced Perfect Termination (FPT)
Forced Perfect Termination can be used on single ended buses where diodes remove over and undershoot conditions. The signal is locked between two actively regulated voltage levels, which results in superior performance over a standard active terminator.
Read more about this topic: Electrical Termination
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