Versatile audio power amplifier

An audio power amplifier comprising:na four-quadrant power supply having a synchronous output rectifier;a first amplification unit and a second amplification unit, each amplification unit comprising:na switching voltage amplifier having a command signal input and an amplified signal output,an output filter between the amplified signal output and a load terminal,a current compensator with a current-compensated command signal output coupled to the command signal input of the switching voltage amplifier,an inner current feedback loop feeding a measurement of current measured at the output filter back to a summing input of the current compensator,a voltage compensator with a voltage-compensated command signal output coupled to the summing input of the current compensator, andan outer voltage feedback loop feeding voltage at the load terminal back to a summing input of the voltage compensator; andcontrol electronics providing signal inputs to the first and second amplification units and controlling the first and second amplification units such that the first and second amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load.

An audio power amplifier comprising:na first, a second, a third, and a fourth amplification unit, each amplification unit comprising:na switching voltage amplifier having a command signal input and an amplified signal output,an output filter between the amplified signal output and a load terminal,a current compensator with a current-compensated command signal output coupled to the command signal input of the switching voltage amplifier,an inner current feedback loop feeding a measurement of current measured at the output filter back to a summing input of the current compensator,a voltage compensator with a voltage-compensated command signal output coupled to the summing input of the current compensator, andan outer voltage feedback loop feeding voltage at the load terminal back to a summing input of the voltage compensator; andcontrol electronics providing signal inputs to the first and second amplification units and controlling the first and second amplification units such that the first and second amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load,the control electronics further providing signal inputs to the third and fourth amplification units such that the third and fourth amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load, andall four of the amplification units are operable together with the first and second amplification units in parallel driving a first side of a bridge-tied-load, and the third and fourth amplification units in parallel driving a second side of the bridge-tied-load.

An audio power amplifier comprising:na first, a second, a third, and a fourth amplification unit, each amplification unit comprising:na switching voltage amplifier having a command signal input and an amplified signal output,an output filter between the amplified signal output and a load terminal,a current compensator with a current-compensated command signal output coupled to the command signal input of the switching voltage amplifier,an inner current feedback loop feeding a measurement of current measured at the output filter back to a summing input of the current compensator,a voltage compensator with a voltage-compensated command signal output coupled to the summing input of the current compensator, andan outer voltage feedback loop feeding voltage at the load terminal back to a summing input of the voltage compensator;a four-quadrant power supply having a synchronous output rectifier, the power supply providing power to the first, second, third and fourth amplification units; andcontrol electronics providing signal inputs to the first and second amplification units and controlling the first and second amplification units such that the first and second amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load,the control electronics further providing signal inputs to the third and fourth amplification units such that the third and fourth amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load, andall four of the amplification units are operable together with the first and second amplification units in parallel driving a first side of a bridge-tied- load, and the third and fourth amplification units in parallel driving a second side of the bridge-tied-load.

An audio power amplifier comprising:na four-quadrant power supply having a synchronous output rectifier;a first, a second, a third and a fourth amplification unit, each amplification unit comprising:na switching voltage amplifier having a command signal input and an amplified signal output; andcontrol electronics providing signal inputs to each of the amplification units and controlling the first, second, third and fourth amplification units such that:nthe first and second amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load,the third and fourth amplification units are operable with separate loads, in parallel driving a common load, or across a bridge-tied-load, andall four of the amplification units are operable together with the first and second units in parallel driving a first side of a bridge-tied-load, and the third and fourth units in parallel driving a second side of the bridge-tied-load.