Output range for interpolation architectures employing a cascaded integrator-comb (CIC) filter with a multiplier

摘要

A cascaded integrator-comb filter (CIC) that includes a differentiator, a rate changer, an integrator, and a multiplier. The differentiator is configured to differentiate an input signal to produce a differentiated input signal. The rate changer is coupled to the differentiator and is configured to interpolate the differentiated input signal based on an interpolation rate to produce an upsample signal. The integrator is coupled to the rate changer and is configured to integrate the upsample signal to produce an output signal. The multiplier is coupled to the differentiator, rate changer, and integrator and is configured to increase the output signal amplitude based on the interpolation rate.