Recent content by nadersb

hello Does "quartus" have any special function or module for calculating discrete-time convolution?

yes I think so. I think there is no way instead of using large size array unfortunately

it is an input to FPGA itself

size itself is an input. it is a filter that number of its coefficient is changeable.and size depends on how accurate filter should be.

yes I know it is not synthesizable because the problems you have mentioned and that's why I need something else. let me explain more, I have a module that its input is not fixed size. it can be 16,32,64... bits. the easiest solution is to use a large enough array for input, but it wastes too...

hello everyone I know that dynamic array is not supported in Verilog and Quartus. I want to know does anybody has an idea or algorithm to use instead of dynamic array. I mean I am searching for something that works instead of a dynamic array. thanks

I am not as amateur as you think sir, I know which pin is which! and how could be possible that our circuit is wrong and we have wrong connectios but we have good gain?! is it miracle or something?! :D with all due respect I think there is something wrong with your theory sir!

no we DON'T! I think you misunderstand sir! when I changed R2 to 150k I also changed AC supply, AS I wrote in my previous comments! with 1.5M we used signal generator with around25 mV but with 150k and 75 k we used transducer! as I said we have another circuit that is transmitter, if you bring...

I don't change the op amp yet, but tomorrow I will. let see what happens if I use op37. again thank you all for paying attention:)

and about noise: I checked DC power supply with o'scope and it doesn't look noisy, it works perfectly.(it is not battery it is a digital DC power supply) as you told me I shorted the input to the ground and there was no noise, after that I connected the transducer but I covered it with my...

gentlemen, some new data: :D I changed power supply to 20 and here is the results: op1: pin2:26mV pin6:540mV so gain is:20.76 op2: pin2:500mV pin6:6.1V so gain is:12.2 and with 9V on the power supply we have these voltages: op1: pin2:24mv pin6:355mV so gain is: 14.79 op2: pin2:330mV...

everyone, I will tell you results and more information on saturday, mr yungman I will collect some information about the transducer and I will tell you;) again thank you all, you are very kind indeed.

skeptic, I am sorry but I don't understand what you mean by power supply noise?! how can I check this?!

First let me thank all of you, all of you are very kind too me;) and sorry for my bad english;) as I said before I am busy a little bit and I can't work on my project these pas days, I will continue on Saturday, so please give some time to test your ideas and tell you the results;) and about...

mr.jim hardy, thank you I will test it;)