Patent ID: 8750431
Filing Date: 2014-06-10
Classification: H03K,H04L

Abstract:
1. A logarithmic detector for extracting a digital data signal from a received input signal, comprising: a plurality of detection stages; a summator; a data slicer; an average filter; wherein said plurality of detection stages is connected to said summator for providing a summation signal as a logarithmic representation of said input signal to a first input of said data slicer and an input of said average filter, said average filter having an output connected to a second input of said data slicer; said data slicer having a data slicer output for providing an extracted digital data signal in dependence on a comparison of said summation signal and an output signal of said average filter; said average filter receiving a first pre-charge voltage and a second pre-charge voltage depending on an output signal of a carrier detector circuit detecting a carrier signal of said input signal, wherein said second pre-charge voltage depends on a modulation depth of said input signal.