|FT-IR Interferogram Sampling Validation and
This is a typical drive circuit for a voice coil. It's not the one from
the Midac but it is similar. The main feature of this circuit is that it will apply
maximum voltage to the coil in order to drive the current in the coil to equal the command
input as quickly as possible. If an extra sinusoidal current is injected into the circuit
at the summing junction of the op amp, it will cyclically disturb the mirror velocity.