an amplifier includes a first switch and a second switch each having a first terminal and a second terminal . the first terminals of the first and second switches respectively communicate with a first tank circuit and a second tank circuit . the second terminal of the second switch communicates with the second terminal of the first switch . a first capacitance having a first terminal connected directly to the second terminal of the first switch and the second terminal of the second switch . a second terminal of the first capacitance is connected directly to a first input voltage of the amplifier . a first load is connected across the first terminal of the first switch and the first terminal of the second switch . the amplifier generates a first output across the first load .