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Hi, permute
Thanks.
Ok, you can put it in a separate threat, but this one is named “Sampling frequency ?” and seems appropriate title for me”.
In all cases singaperumal will be forced to select the sampling frequency nad to test the system.
Although I am still interesting in the topic it...
ark5230 ,
Thank you for the post.
-------------------
Paper 1:
The conclusion on page 20 is correct.
* If you change the phase of the sampled signal you will change the amplitude of the samples and this is a kind of AM of the samples from the phase of the sampled signal
* If you change the...
Hi SunnySkyguy,
Thank you for the attention to may post and to the papers.
4x is rule based on theorems guarantying -3bB band width
Please see the theorems and the tables in the paper.
Please accepted my apologize if my English or stile is not comprehensible.
-3dB bandwidth is accepted rule...
Hello!
May be that will help you at least when you sample sinusoidal and co-sinusoidal signals:
“A New Approach to Sampling Sinusoidal and Cosinusoidal Signals”, P T Petrov,
https://www.ieindia.org/pdf/88/88ET104.pdf
Also may be it will be useful to know:
“Sampling of the Simplest Signals” P...
Hello!
May be the "At Least 4x" rule will work for you.
May be that will help you at least when you sample sinusoidal and co-sinusoidal signals:
“A New Approach to Sampling Sinusoidal and Cosinusoidal Signals”, P T Petrov,
https://www.ieindia.org/pdf/88/88ET104.pdf
Also may be it will be...
Hi All,
1. There is no any proof that Nyquist stated any sampling theorem related to electrical signals. If disagree, please give paper, page, line, exact relevant quotation with proof.
2. Shannon gave two different version of a “ sampling theorem” and both of them, are wrong and irrelevant to...
Hi,
I think that 8279 is a preprogrammed version (ROM based) of UPI-41/A.
Or Universal peripheral interface 8041/A, 8641/A, 8741/A, etc.
It is similar to UPI-42 or 8042, 8742.
It is based on MCS-48 or 8048, 8748, 8049, ….., etc.
UPI-41/42 was used in the keyboards of IBM PC.
I hope that will...
Re: peak detector design
Hi mohmd10
May be that will help you:
Please note that you have to develop clear requirements and test procedures.
Several notes, questions and proposals:
1. Fix at the lowest possible frequency, e.g. 1000Hz
2. Fix the test levels, e.g. 5000mV.
3. You cannot have the...
Re: peak detector design
Hello!
mohmd10 :
“I need an electronic circuits:
* to measure the peak
* of any sine wave
* in range from 0 to 5 v with high accuracy”
Is that means:
1. To detect the positive peak?
2. Frequency from approx 0 to 100 kHz?
3. Tested at 5000mV p-p?
4. Accuracy in...
Re: peak detector design
Dear pauloynski,
Thanks for the answer.
You are right.
The gain i really low (approx 10).
But the results are not good from my point of view.
e.g.
**broken link removed**
If you are satisfied - that OK for you.
BR
Petre Petrov
Re: peak detector design
".... has a sine wave input at 100khz and i need senstivity as 5 mv ...
"... TL070 instead of LM358 ..."
Hi
You need some much more faster than LM358 and TL07X for good accuracy at 100 kHz.
If you make several simple calculations you will have the results.
BR
Petre...
Re: low-pass filter
Just to say Many thanks LvW and Audioguru for your replay.
I am sure that you are more competent in that field from me.
“Half power frequency” seems good for me.
In my firm opinion:
1.Repeating inappropriate terms is a huge error.
2.That error is damaging the newcomers...
Re: low-pass filter
Hello to all!
As I have already posted at
In my opinion the “cut-off frequency” is inappropriate, unclear and misleading term.
In all real cases noting is “cut – off” or at least I don't know similar case.
There are things that are attenuated/modified at some level.
In...
infinite gain pole
Hello LvW
Thank you for your attention.
I am happy that I have some support from your side to the as you say "philosophical" parts of my contributions.
Briefly:
1. Any particular point of any characteristic has some meaning and importance.
2. Any particular point of any...
Hello!
Analog Devices, Maxim, National semiconductor, Texas instruments, etc have a lot of application notes on the subject.
May be they could be useful for your case.
e.g.
Fundamentals of Sampled Data Systems Application Note (AN-282)...
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