Patent ID: 7327294

Claim:
A device comprising a processing circuit (B 1 ; B 1 , B 11 ) with a predetermined limited dynamic range, and an automatic gain control circuit comprising: a gain determining circuit (B 2 ) for determining a first gain factor (g), a first gain controller (B 3 ) for controlling an amplitude of an input signal (S 1 ) with the first gain factor (g) to supply a gain controlled signal (S 3 ) to the processing circuit (B 1 ; B 1 , B 11 ), a compensation circuit (B 5 ) for determining a second gain factor (dg) based on the first gain factor (g) and input parameters (DL, TR, DV) defining a time variation of the second gain factor (dg), and a second gain controller (B 1 ; B 10 ) for receiving an output signal of the processing circuit (B 1 ; B 1 , B 11 ) and the second gain factor (dg) to obtain a compensated output signal (S 2 ) being substantially compensated for an amplitude change of the gain controlled signal (S 3 ) due to a change of the first gain factor (g).