Patent ID: 6023718
Filing Date: 2000-02-08
Classification: H03H

Abstract:
A filter system for filtering a digital input signal to produce an oversampled digital signal, the digital input signal having alternating first data values and second data values, the filter system comprising:demultiplexer means for producing a first signal including the first data values and a second signal including the second data values;first filter means for filtering the first signal and the second signal to produce a first filtered signal including filtered first data values;second filter means for filtering the first signal and the second signal to produce a second filtered signal including filtered second data values; andmultiplexer means coupled to receive the digital input signal at a first input port, the filtered first data values at a second input port and the filtered second data values at a third input port for alternately selecting the filtered first data values, the values of the digital input signal and the filtered second data values to produce the oversampled digital signal.