The CM voltage (VCM) to be compensated is detected at the
noise receiver (the motor) and compared with the desired VCM
output, set to zero; the error signal is suitably processed by a
feedback action, then it is amplified and injected to compensate
the VCM. In order to perform an optimal compensation, the
proposed circuit should be able to follow the rapid transitions
due to the inverter switching. This implies the use of a power
amplification stage which is characterized by high slew rate and
high gain/bandwidth product (GBW).