Patent ID: 8861747

Claim:
A compressor circuit for a listening device, the compressor circuit comprising: a pair of input terminals; and a pair of output terminals, wherein the compressor circuit is configured to receive an electric input signal representing an audio signal with an input voltage swing V ipp at the input terminals and to provide a possibly compressed version of the input signal as an output signal with an output voltage swing V opp at the output terminals, and the compressor circuit further comprises an AC to DC voltage converter for generating a DC-control voltage based on the electric input signal or an AC signal derived therefrom; and a voltage controlled resistance for providing the output voltage swing V opp controlled by the DC-control voltage, wherein the compressor circuit is energized by the electric input signal, and wherein the voltage controlled resistance comprises a first FET transistor and a second FET transistor, each FET transistor including a source terminal, a gate terminal, and a drain terminal, and wherein the source terminal of the first FET transistor is directly electrically connected in series to the source terminal of the second FET transistor.