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# Cic And

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## simulating cic ipcore

is an encrypted file used for synthesis only and can be simulated. The simulation need to use the dedicated simulation model generated along with the synthesizable core.

## Interpolating and Decimating CIC filter based on sinc function

The question is still unclear. Do you want sinc^n filters without decimation? Or implement cic? As you should know from literature, transfer function of a cic decimator isn't exactly sinc rather than the quotient of two sine^n functions which approaches sinc^n for large decimation factors.

## Interpolating and Decimating CIC filter based on sinc function

How to realize a sinc function using cic filter for decimation and interpolation ??? Can I combine interpolation and decimaton methods inorder to get the complete response of a sinc function???

## Interpolating and Decimating CIC filter based on sinc function

How to realize a sinc function using cic filter for decimation and interpolation ??? Can I combine interpolation and decimaton methods inorder to get the complete response of a sinc function???

## doubt with cic filter

i read few articles and i didn't find any criteria for deciding N Sounds like you missed a basic introduction to cic decimators. The number of stages N is the filter order, you can visualize it's effect by looking at the cic response either in time or frequency domain. In frequency domain, the magnitude characteristic is approximate

## 3-Stage Filter wit 1 Bit Input for a Delta-Sigma Modulator (MATLAB->VHDL)

Hello, I?ve got problem with my 3 Stage Filter Design in MATLAB (for a Delta-Sigma Modulator), it would be great if someone could help! The delta-sigma modulator has an input signal of 1kHz and wir OSR = 512 an output of 1 MHz. So I decided to do a 3 stage Filter: cic w. 1 Bit input (decimation factor R = 128), cic Compensator (...)

## CIC filter in opencore

Dear all, I wanted to know is the cic filter implemented in open core example. Is this a combination of registers and adder ? IS it a example for loopy structure ? Please let me know. Thank you

## CIC Filter Design using Matlab

Hello Everyone, I am designing cic filter, I have one doubt, how we choose no. of sections of comb and integrator

## [Mov]generating cosine using DDS IP core when i port map to the CIC filter o/p Is XXX

I believe both another forum member and I responded to this post, but now that it has been moved it no longer has those responses and a search didn't come up with any other similar posts for cosine DDS that matches the original post. What is the point of moving threads if it corrupts the integrity of subsequent responses?

## decimation factor of a three stage cic filter

In a three stage cic filter and the decimation factor is 32 , does it means that overall decimation is 32*32*32 ( 32768 )or just 32 only? - - - Updated - - - I search the google found it only 32. For dso in fixed 100MHz sampling clock to adc , can I achieve lower the sampling rate like selecting 1ms , 5m

## reduction in the SNR after output passed through CIC filter

I am studying the use of decimation filters in Sigma Delta modulators. While simulating I came across an unusual result. i) I have an ideal 2nd order 1-bit (OSR=2048) sigma delta modulator. The SNR of its output is 145dB. ii) I passed the modulators output through the first cic filter (decimation factor = 64, no. of sections=3, wordlength o

## Overflow of integrator in CIC filter

Hello all, I am trying to make cic filter using VHDL and will implement it on FPGA. I could design a cic filter with the output from comb part does not overflow, but it DOES overflow in integrator part. From some documents and my result, I know the overflow of integrator does not influence the final output. However, (...)

## DSP filter problem in matlab

hello all , I need to implement cic decimator, here is the matlab code using fvtool r=64; m=1; n=3; iwl=16; owl=12; IFL = 0; % Input fraction length cic = mfilt.cicdecim(r,m,n); cic.InputFracLength = IFL; f_in =5120; h=fvtool(cic,'FS',f_in); I checked the impulse response using the fvtool (...)

## CIC decimator filter impulse response check

hello all , I have a problem when designing cic filter on matlab here is the code : r=64; m=1; n=3; IFL = 0; % Input fraction length cic = mfilt.cicdecim(r,m,n); cic.InputFracLength = IFL; I use fvtool to check the impusle response and I got figure 1 attached , 9330093299 I also use

## problem in vcs by synopsys

hello ALL I use vcs program from synopsys for verilog code compilation on redhat5 I am designing a digital filter in behavioral verilog "cic.v" and it's test bench is "test_cic.v" using vlogan, vcs,dve. vlogan went great, the problem is with vcs command , I got this error (...)

## ctype-stubs_32.a No such file or directory

hello ALL I use vcs program from synopsys for verilog code compilation on redhat5 I am designing a digital filter in behavioral verilog "cic.v" and it's test bench is "test_cic.v" using vlogan, vcs,dve. vlogan went great, the problem is with vcs command , I got this error (...)

## Help!!!How to design cic filter for interpolation?

I would like to design a cic filter as shown in the picture attach. The comb part is differentiator and the other part on the right is integrator. However i do not now how to implement the upsample (L).. I try to build it with simulink where the upsample(L) is a switch operate at higher sampling rate. but due to the integrator which act as accumula

## construct CIC filter using simulink

I would like to construct a cic filter for interpolation using simulink but not from the dsp toolbox. Figure shows the filter i have constructed. It does not seem to be correct..can someone help me out? Thanks I would like to upsample 64 times, hence the switch is operate at the 64xfin...the comb side is fin and the integrator is 64xfin [ATTA

## Need help with CIC filter

You dont specify the input frequency. If you sample the RF without down conversion the cic filter needs to be implemented in hardware (for speed). In a FPGA for example. FPGA programming is another area of expertise beside DSP. and it is usually done in VHDL or Verilog. look here> [QUO

## about doubt in the topic of cic

I am doing a project in matlab simulink. I am giving input to cic filter a fixed wordlength 24 bit and fractional length 23.now i am setting the parameters in the cic interpolation block in matlab simulink with interpolation factor 8,differential delay M=1,no of sections as 9 and i am using zero latency interpolator.Now w