A decimation system and decimation circuit for decimating waveform data on
an oscilloscope. The decimation circuit is implemented using sixteen
parallel 16-to-1 multiplexers connected in parallel to a data bus which
selectively captures samples based on control signals generated by a
sample counting circuit. Decimation factor and phase values can be input
to program the amount of decimation performed by the circuit. The
decimation system provides even more flexibility in controlling the
decimation and is formed by combining several of the decimation circuits
with corresponding analog-to-digital converters and memory segments.