Differential push-pull gain controlling method and apparatus to reduce the effects of rotational eccentricity

摘要

An apparatus comprising a photo diode array, a differential push-pull generator circuit and an attenuation prediction circuit. The photo diode array may be configured to generate a plurality of beam signals. The differential push-pull generator circuit may be configured to generate a differential push-pull signal with one or more gain blocks in response to (i) a plurality of input signals, (ii) a gain approximation signal and (iii) the plurality of beam signals. The attenuation prediction circuit may be configured to (i) predict an attenuation factor of the differential push-pull signal and (ii) generate the gain approximation signal in response to (a) a plurality of amplification signals and (b) a plurality of angle signals.