1.   The current consumption of the stage will be fixed by the load resistance to which the collector is connected.

2.   A switchable ladder attenuator designed such that its input resistance equals half the load resistance.

3.   A snag with the T attenuator is that three resistors need to be adjusted to vary the attenuation yet maintain the input resistance equal to the load resistance.

4.   Consider their response to a steady sinusoidal input signal when a load resistance R L is connected across the output terminals.

5.   Often expressions for the values of the reactive components of Butterworth filters are quoted corresponding to unit load resistance and unit cut-off pulsatance.