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235 Threads found on edaboard.com: **Iir Filter**

One of the closest book you can try getting is
Labview Digital Signal Processing and Digital Communication... However, there is only one chapter on FIR and **iir** design... and is rather basic... not too sure if it is of help...
Or else you could look up NI website... they do have some great tutorials in Labview... otherwise post at the user fo

Elementary Electronic Questions :: 07-16-2007 10:19 :: watertreader :: Replies: **2** :: Views: **1035**

FIR is finite impulse response and hence it would be characterised by the absence of poles.... for the case of **iir** there would be poles......

Digital Signal Processing :: 07-04-2007 07:10 :: A.Anand Srinivasan :: Replies: **2** :: Views: **15694**

Check moving average. It i sthe simplest FIR,
But it can be realized with **iir** structure eficiently . Can somone let me know it the moving average is actually FIR or **iir** :-)

Digital Signal Processing :: 06-10-2007 11:01 :: kali :: Replies: **6** :: Views: **1897**

An AR **filter** is an **iir** **filter** where as MA is an FIR **filter**

Digital Signal Processing :: 05-25-2007 19:37 :: purnapragna :: Replies: **5** :: Views: **9475**

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

PLD, SPLD, GAL, CPLD, FPGA Design :: 05-26-2007 16:27 :: rsrinivas :: Replies: **6** :: Views: **2393**

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

Digital Signal Processing :: 05-05-2007 20:21 :: corgan :: Replies: **2** :: Views: **1525**

What kind of **filter** FIR or **iir**?
I think you should ask in the DSP/Signal processing forum.
In Matlab there are functions that calculate the **filter** coefficients. You should provide the type, bandstop/notch for example the window type for FIR or the **filter** type Butterworth, etc for **iir**. I think you can find (...)

Analog Circuit Design :: 04-11-2007 14:50 :: Eugen_E :: Replies: **2** :: Views: **1400**

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 ncverilog compiler and gcc comp

ASIC Design Methodologies and Tools (Digital) :: 04-08-2007 14:14 :: aji_vlsi :: Replies: **3** :: Views: **1375**

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) with ref

Digital Signal Processing :: 04-08-2007 09:55 :: vsrpkumar :: Replies: **0** :: Views: **977**

vjfaisal,
FIR (Finite Impulse Response) **filter**s are cosntructed using weighted sums of current and past samples of input data.
.
**iir** (Infinite Impulse Response) **filter**s are cosntructed using weighted sums of current and past samples of data plus weighted sums of previous samples of output data.
.
The **filter** "taps" (...)

Digital Signal Processing :: 03-28-2007 12:51 :: Kral :: Replies: **4** :: Views: **937**

Hi All,
I need the procedure and theory(maths) to get the equivalent continuous-time impulse/frequency response of a digital **iir** **filter**.
To put the problem in other words,
I have the coefficients of the digital **iir** **filter** and need to identify the parameters for equivalent analog **filter**.
Also, the (...)

Digital Signal Processing :: 02-09-2007 11:21 :: shamprsd :: Replies: **2** :: Views: **1241**

Is this expression true:
"A practical notch **filter** is designed with **iir** **filter**."
Why?

Digital Signal Processing :: 01-28-2007 06:12 :: soheyl :: Replies: **4** :: Views: **1712**

Hi,
If you want a prototype **iir**, download ONEoverT, generate a project file and send it to them or email them with your specifications. It costs about $50 for an .edf or equivalent file. They mention it on their website. I don't think they will give you the VHDL though, that would cost more.
Bob

PLD, SPLD, GAL, CPLD, FPGA Design :: 01-16-2007 10:42 :: Bob_C :: Replies: **6** :: Views: **3804**

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 -3db frequency (...)

PLD, SPLD, GAL, CPLD, FPGA Design :: 01-04-2007 06:34 :: anand_biomedical :: Replies: **3** :: Views: **7733**

IS recursive **filter** **iir**,and transersal **filter** FIR especially with taps?

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-23-2006 15:04 :: yellff :: Replies: **1** :: Views: **1299**

Digital Signal Processing :: 12-19-2006 08:45 :: echo47 :: Replies: **4** :: Views: **1382**

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 (...)

PLD, SPLD, GAL, CPLD, FPGA Design :: 12-15-2006 06:03 :: rsrinivas :: Replies: **1** :: Views: **12476**

Mathematics and Physics :: 09-30-2006 17:20 :: konarkk :: Replies: **6** :: Views: **1850**

Hi guys,
If I have known the coefficient of **iir** **filter**,how can i import it to Matlab?
Thank you!

Digital Signal Processing :: 11-28-2006 16:35 :: henryming :: Replies: **2** :: Views: **1190**

amriths04,
It's not possible to compare the responses in general. What you can do is design an **iir** **filter** to meet a set of specifications. The design a fir **filter** to meet the same specifications. The compare the frequency and time domain responses.
.
Yes **iir** **filter**s are realizeable. A common method of (...)

Digital Signal Processing :: 10-30-2006 16:36 :: Kral :: Replies: **14** :: Views: **5628**