Patent ID: 7919994
Filing Date: 2011-04-05
Classification: G08C

Abstract:
1. A receiving stage for a multi-stage signal modulated upon a supply voltage, comprising: a supply potential terminal; a ground potential terminal; a low-pass filter having an input connected to the supply potential terminal and the ground potential terminal, and having an output arranged to output a low-pass filter output signal; a high comparator having a high threshold value, an output, and a receiving signal input connected to the output of the low-pass filter and arranged to receive the low-pass filter output signal; a low comparator having a low threshold value, an output, and a receiving signal input connected to the output of the low-pass filter and is arranged to receive the low-pass filter output signal; a high threshold value generator arranged to raise the high threshold value when the low-pass filter output signal is less than the high threshold value, and to lower the high threshold value when the low-pass filter output signal is greater than the high threshold value; and a low threshold value generator arranged to raise the low threshold value when the low-pass filter output signal is less than the low threshold value, and to lower the low threshold value when the low-pass filter output signal is greater than the low threshold value.