this code is for a decimation filter with polyphase structure , so the original filter is decomposed by 5 filters which is the decimation factor in that case and each of them is selected each Fs/5

This paper describes a 10-b high-speed COMS DAC fabricated by 0.8-pm double-poly double-metal CMOS technology. In the DAC, a new current source called the thresholdvoltage compensated current source is used in the two-stage current array to r