An analog to digital converter device that includes a sample rate
reduction system configured to sample a radio frequency (RF) signal. The
RF signal has a bandwidth centered at a first frequency. The sample rate
reduction system is configured to directly sample the RF signal at a
sampling rate that is an integer multiple of the first frequency. The
sample rate reduction system also is configured to provide M-sample
outputs, each of the M-sample outputs being sampled at a reduced sampling
rate equal to the sampling rate divided by M. M is an integer sample rate
reduction value. An N.sup.th order complex bandpass filter is coupled to
the sample rate reduction system. The complex bandpass filter is
configured to filter each of the M-sample outputs to obtain a plurality
of complex baseband signals.