Patent ID: 6552591
Filing Date: 2003-04-22
Classification: H03G,H04B

Abstract:
An apparatus for processing an analog input signal, said analog input signal being subject to variations in amplitude, said apparatus comprising:a dynamic range compressor circuit with a circuit input and a circuit output coupled to receive said analog input signal for compressing the amplitude dynamic range of said analog input signal to obtain a compressed internal signal corresponding to said analog input signal at said circuit output; a detection circuit coupled to said circuit output of said dynamic range compressor circuit to produce a detected signal corresponding to amplitude of said compressed internal signal; a frequency-selective filtering means for filtering said detected signal to obtain an averaged control signal for a signal processing element; and a signal processing element responsive to said averaged control signal and operative on said circuit output of said dynamic range compressor circuit to expand the compressed internal signal to obtain an output signal representative of said analog input signal.