Patent ID: 6195029
Filing Date: 2001-02-27
Classification: H03M

Abstract:
An analog-to-digital (A/D) conversion system including analog and digital processing techniques to thereby digitally process an analog input signal and capture an improved dynamic range thereof, said system comprising:an analog processing amplifier for receiving the analog input signal, wherein pre-emphasis filtering is applied, followed by logarithmic soft limiting when the analog input signal is in an overload region of operation, and wherein a first output signal is generated therefrom;an audio amplifier for receiving and processing the first output signal to thereby attenuate the first output signal and generate a second output signal;an analog-to-digital (A/D) converter for receiving and processing the second output signal to thereby generate a digital third output signal; anda digital signal processor (DSP) for receiving the digital third output signal, wherein the DSP digitally de-emphasizes the digital third output signal in a manner which is complementary to the analog pre-emphasis filtering to thereby generate a fourth output signal.