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https://designers-guide.org/forum/YaBB.pl Simulators >> System Simulators >> ADC https://designers-guide.org/forum/YaBB.pl?num=1326281799 Message started by thomasT on Jan 11th, 2012, 3:36am |
Title: ADC Post by thomasT on Jan 11th, 2012, 3:36am hello, I have just started working on Analog to digital converters with 8 bit and now doing some literature study. i had some basic questions: with sin input y = A sin wt with w = 2*pi*f,how we define clock frequency (is it same as input frequency of the signal? ), sampling frequency of the system? |
Title: Re: ADC Post by raja.cedt on Jan 11th, 2012, 4:06am f is input frequency, and there is no need to have precise sampling frequency rather than fs>2*fin, so no need to specify any where. Thanks, Raj. |
Title: Re: ADC Post by thomasT on Jan 11th, 2012, 5:32am raja.cedt wrote on Jan 11th, 2012, 4:06am:
so in sin wt , does t represents 1/(Fclock) and Fclock = OSR*Fsampling?? |
Title: Re: ADC Post by raja.cedt on Jan 11th, 2012, 5:45am t means time. read some basic books, there is no need to keep fsample in expressions.. Thanks, Raj. |
Title: Re: ADC Post by singh on Jan 11th, 2012, 6:01am t represents time |
Title: Re: ADC Post by thomasT on Jan 11th, 2012, 6:17am guys i know t represents time i just need to know regarding clock frequency stuff? is Fclock = Freq_sample * OSR? |
Title: Re: ADC Post by raja.cedt on Jan 11th, 2012, 6:33am Hello, man please understand. Forget about OSR, at this point don't think about OSR. OSR is like how large your sampling frequency compared to Nyquist rate. Actually once you sample the signal there is no continuous signal only discrete signal. Let us say you have signal called sin(2*pi*fin*t), now after sampling sin(2*pi*(fin/fs)*n). Here Fs is sampling frequency. So there is no point asking after sampling what is the meaning of t Thanks, Raj. |
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