How does a CIC filter work?
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 CIC decimation filter?
The CIC Decimation block performs a sample rate decrease (decimation) on an input signal by an integer factor. Cascaded Integrator-Comb (CIC) filters are a class of linear phase FIR filters comprised of a comb part and an integrator part.
How do you test a CIC filter?
Two Easy Ways To Test Multistage CIC Decimation Filters
- The traditional method for testing such a filter implementation is to apply to the filter a low-frequency sinusoidal xin(n) input sequence of frequency fin Hz, having N samples/cycle, and a peak amplitude of Ain.
- then the filter is operating properly.
What are the advantages of FIR filter?
Compared to IIR filters, FIR filters offer the following advantages:
- They can easily be designed to be “linear phase” (and usually are).
- They are simple to implement.
- They are suited to multi-rate applications.
- They have desirable numeric properties.
- They can be implemented using fractional arithmetic.
Why do we need decimation filter?
The most immediate reason to decimate is simply to reduce the sampling rate at the output of one system so a system operating at a lower sampling rate can input the signal. For example, if you double the sample rate, an equivalent filter will require four times as many operations to implement.
What are the main characteristics of anti aliasing filter?
Ensures that bandwidth of signal to be sampled is limited to frequency range. To limit the additive noise spectrum and other interference, which corrupts the signal.
What do you need to know about CIC filters?
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.
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.
How does a cascaded integrator-Com B CIC filter work?
IntroductionThe 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.
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.