Patent ID: 7813515

Claim:
A multi-channel power amplifier for driving a plurality of loads, each associated with a respective channel, each channel comprising a pair of operational amplifiers, first and second, one operational amplifier of each channel being connectable through switches either in a bridge configuration with the other operational amplifier or in single-ended configuration to a constant reference voltage for driving the load of the respective channel such that at least one channel is operable to be in said differential configuration while at least one other channel is operable to be in said single-ended configuration, the amplifier further comprising at least a window comparator for monitoring the signal level and outputting a logic control signal for said switches, wherein the power amplifier comprises: a unique voltage buffer, distinct from said operational amplifiers, outputting said constant reference voltage; the output of each channel is configurable independently from the output of the other channels; each channel includes a dedicated window comparator monitoring the level of the signal input to the channel and generating logic control signals for positioning the output configuring switches of the channel.