Application: We are making a long range nanopositioning system with
range 10mm and resolution 10nm. The mechanism is actuated by voice coil
motor which needs a amplifier driver. The driver has to deliver high current (for
range) with ultra low noise and distortion (for resolution).
Specifications for amplifier circuit:
1. Max current : 10A
2. Bandwidth : 200Hz (my only hope to achieve other specifications!)
3. Noise Floor : -110dB
4. Total harmonic Distortion > 100dB
Q) Is it possible to design an power amplifier circuit with such noise specifications?
Q) Is using composite amplifier design in which the power opamp is preceded by a precision op amp can offer better noise and distortion performance from the overall circuit?
Q) How can I simulate noise and distortion any op amp circuit? Is there a solution in PSpice?
