Drive control to prevent simultaneous conduction in push-pull switching amplifier

摘要

A drive circuit responsive to the phase of the amplifier output current ensures that the non-conducting amplifier element remains off while the other amplifier element conducts. The output current phase can be detected either from the individual amplifier element outputs or from their combined outputs. Adjustments are made to compensate for any phase shift which occurs between the input to the amplifier and the point in the output at which the phase is detected.