A minimal area integrated polyphase interpolation filter uses a symmetry
of coefficients for a channel of input data. The filter includes an input
interface block for synchronizing the input signal to a first internal
clock signal; a memory block for providing multiple delayed output
signals; a multiplexer input interface block for outputting a selected
plurality of signals for generating mirror image coefficient sets in
response to a second set of internal control signals, a coefficient block
for generating mirror image and/or symmetric coefficient sets, and to
output a plurality of filtered signals, an output multiplexer block for
performing selection, gain control and data width control on said
plurality of filtered signals, an output register block synchronizing the
filtered signals, and a control block generating clock signals for
realization of the filter and to delay between two channels to access a
coefficient set, thereby minimizing hardware in the filter.