Patent ID: 6963737
Filing Date: 2005-11-08
Classification: H04M,H04W

Abstract:
1. A circuit configuration for detecting metering pulse in a subscriber terminal, comprising: an input for obtaining a signal containing metering pulses; an A/D converter circuit connected to said input for obtaining the signal containing the metering pulses, said A/D converter circuit providing an output signal; a level shifter providing the signal containing the metering pulses to said A/D converter circuit; a detection device; and a digital interpolation filter connected between said A/D converter circuit and said digital comparator circuit; said detection device including a digital comparator circuit for performing a comparison of the output signal from said A/D converter circuit with a reference value and for providing an output signal dependent upon the comparison; and said detection device including a detector unit for determining and counting valid metering pulses in the output signal from said digital comparator circuit.