Patent ID: 8179196

Claim:
A method of amplifying signals, the method comprising: applying, at two different terminals of a first switching module, a first DC signal and a first AC signal varying within a first voltage range, wherein the first switching module comprises a first field effect transistor (FET) having a source, a drain, and a gate, wherein the first DC signal is applied to the gate of the first FET, wherein the first AC signal is applied to the source of the first FET; applying, at two different terminals of a second switching module, a second DC signal and a second AC signal varying within a second voltage range, wherein the second voltage range includes voltage values less than or equal to the voltage values of the first voltage range, wherein the second switching module comprises a second field effect transistor (FET) having a source, a drain, and a gate, wherein the second DC signal is applied to the gate of the second FET, wherein the second AC signal is applied to the source of the second FET; connecting the first switching module and the second switching module in series using their respective third terminals; and obtaining an output signal from the connected switching modules, the output signal being responsive to the voltage difference between the first DC signal and the first AC signal, and to the voltage difference between the second DC signal and the second AC signal; wherein the output signal varies between the highest voltage value of the first range and the lowest voltage value of the second range.