Patent ID: 8143945

Claim:
A switched mode amplifier that receives an input signal and a supply voltage source, comprising: a switched amplifier that sources or sinks a negative or a positive current to or from a load, where the load and the current define a voltage over the load, the switched amplifier comprising an inductor connected between first and second nodes; a first controllable switch connected between the first node and a third node; a second controllable switch connected between the first node and a fourth node; a third controllable switch and a first diode connected between the first node and a fifth node; a fourth controllable switch connected between the second node and the fourth node; a fifth controllable switch and a second diode connected between the second node and the fifth node; and a sixth controllable switch and a third diode connected between the third node and the second node; where the supply voltage source is connected between the third and the fourth nodes, and where the load is connected between the fifth and the fourth nodes; a controller that generates control signals for the switched amplifier in response to an input signal and a feedback signal, where the controller controls the controllable switches using the control signals; and a feedback unit connected to the controller and the load, where the feedback unit generates the feedback signal from the voltage over the load.