How does a CIC filter work?
An interpolating CIC filter has zeros inserted between its input samples reducing its gain by a factor of 1/R to account for the zero-valued samples, so the net gain of an interpolating CIC filter is (NR)M/R.
What is the filter type of N stage CIC decimation filter?
FIR filters
CIC filters were invented by Eugene B. Hogenauer, and are a class of FIR filters used in multi-rate digital signal processing. The CIC filter finds applications in interpolation and decimation. Unlike most FIR filters, it has a decimator or interpolator built into the architecture.
Which is compensation filter follows the CIC filter?
Such filters are called “compensation filters.” For data rate down conversion, the compensation filter follows the CIC filter. For up sampling systems, the compensation FIR filter pre-conditions the data and is followed by a CIC filter. In other words, the compensation filter always operates at the lower rate in a rate conversion
Which is the inverse of the CIC filter?
To overcome the magnitude droop, a FIR filter that has a magnitude response that is the inverse of the CIC filter can be applied to achieve frequency response correction. Such filters are called “compensation filters.” For data rate down conversion, the compensation filter follows the CIC filter.
What is the structure of a CIC Fi LTER?
A CIC filter consists of an equal number of stages of ideal integrator filters and comb filters. Its frequency response may be tuned by selecting the appropriate number of cascaded integrator and comb filter pairs. The highly symmetric structure of a CIC fi lter allows efficient implementation in hardware.
How is a CIC filter used in fir?
Understanding CIC Compensation Filters Introduction The cascaded integrator-com b (CIC) filter is a class of hardware-efficient linear phase finite impulse response (FIR) digital filters. CIC filters achieve sampling rate decrease (decimation) and sampling rate increase (interpolation) without using multipliers. Altera’s CIC Compiler