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12 Threads found on edaboard.com: Iir Filter Verilog

Hi.I am implementing a Low power iir filter in verilog,I have to discard the extra bits that comes at the output due to feedback.when the extra bits are discarded filter characteristics will some how get changed?give me any suggestion about specifications so that my filter response is stable and not very (...)

Scaling of IIR filter coefficients for Fixed-Point FPGA implementation of filter

I've designed a biquad iir filter, and I would like to quantize the filter coefficients so that the difference equation can be used in a fixed-point FPGA code written in verilog. The filter input ranges between 0 and ((2^12) -1) fixed-point values. The difference equation is Direct Form I ( ), an

Have anyone implemented an cascaded IIR filter in Verilog ?

Hi guys I have got this problem for a month ,but i don't know how to finish it ? So will you please send me the programs to me ? So I can have a better knowledge of iir Thank you

I need only verilog code for a delta-sigma adc..........

Free download pdf: verilog code for iir filter of first order

Help me with IIR filter implementation in VHDL

hi all, actually in verilog iir is working but same program in vhdl is not working is a 4 tap iir filter have u generated through matlab....? how is it 4 tap? cos matlab gives it as biquad sections. is it 4'th order...? is it the netlist not working or the simulation? how did u decide it is not wo

What's wrong with the verilog code?

I would like to design a first order iir high filter with equeation y = x - x + a * y I wrote the following verilog code, but the result is not correct . Can any one tell me why? input wire signed Xn, output reg signed Yn, parameter a = 0.9; reg signed Xn-1; wire signed diff = Xn-Xn-1; a

Can I simulate Verilog and C code simultaneously ??

I designed a first order iir filter in verilog with floating point coefficients.I am writing equivalent C code.What my doubt is is it possible to simulate both verilog and C code simultaneously with the test vectors defined in verilog test bench.I think there will be solution for this case.I am using (...)

query in limit cycle effect

I am implementing iir filter in verilog with equation y(n)=a*x(n)+(1-a)*y(n-1) a is floating point no with 5 bits x is integer with 7 bit input .y(n) is 12 bit with 5bits floating and 7 bit integer part I used 2's complement logic for 1-a. I did multiplication by shit and add.I used rounding function for y(n) (...)

implementing IIR bandpass filter in FPGA using verilog code

Hi, I need to implement 2nd order iir bandpass filter in FPGA using verilog code. 2nd order iir bandpass filter transfer function is H(z) = (0.13875 - 0.13875z-?)/(1 - 1.6614z-1 + 0.7225z-?) (Note:In above equation z-1, z-? are nothing but z power -1 , -2.) center frequency is 24.6875 Hz lower (...)

verilog code for 2nd order IIR bandpass filter

Hi u haven't given the cut off values however here is a 16 bit input 16 bit output 2'nd order iir butterworth bpf. lfc 250 Hz and Hfc 555Hz. matlab generated code. // Discrete-Time iir filter (real) // ------------------------------- // filter Structure : Direct-Form I, Second-Order Sections // Number of (...)

Biquad implementation in fpga

Hi all, I have a problem. I am into designing an array of bandpass filters so that it forms a filter bank. I have designed the filter in matlab using fdatool and generated the hdl (verilog) code from it.it's a 6'th order bpf with 3 biquads(iir Butterworth). pls do let me know that if i can (...)

FFT FILTER DESIN BY USING VHDL/VERILOG

hi, you can make a iir filter in many differently ways. look at an specific book... like "Digital Signal Processing" by Alan V. Oppenheim and Ronald W. Schafer or look at MATLAB (release 14 at least) tutorial. There are many ways to do a iir filter in a digital computer. Then you can translate the digital form (...)