Current limiter

A current limiter for independently limiting both the peak current and average current of a transconductance switching servo amplifier by clamping the input voltage of said amplifier, comprising:

• (a) peak current limit set means adapted for connection to a fixed voltage source for producing an adjustable peak limit voltage corresponding to a peak current limit;
• (b) average current limit set means adapted for connection to a fixed voltage source for producing an adjustable average limit voltage corresponding to an average current limit;
• (c) averaging means for producing an average voltage corresponding to the average current of said amplifier;
• and
• (d) clamping means connected to said peak current limit set means, to said average current limit set means and to said averaging means for clamping said amplifier input voltage to said adjustable peak limit voltage when said input voltage tends to exceed said adjustable peak limit voltage or when said average voltage exceeds said adjustable average limit voltage.