payam_s
Newbie level 3
Hello All,
I am about to design a CT/BP/Complex ΔΣ ADC . First I have designed a LP DT Real NTF then changed it to CT prototype next I've shifted the center freq. to 5 MHz. When I plot the NTF and STF it seems the filter property is ok. I have also extracted the ABCD matrix to be able to simulate the system in time domain.
But I have difficulties Crying or Very sad in simulating the system in time domain. I don't know how input(s) should look like. what should be the format of the input signal(s) into this complex system and also how should I do copmlex quantization? and finally how should be the format of the output in order to window it, take fft to plot and analyze the PSD. the codes and functions I used and defined to design NTF, converting to continuous time domain and shifting the frequency and also extracting the state-space matrices ABCD are available upon request to help you more how I did in my design flow to guide me with my questions.
Hope to hear from you soon Smile
I am about to design a CT/BP/Complex ΔΣ ADC . First I have designed a LP DT Real NTF then changed it to CT prototype next I've shifted the center freq. to 5 MHz. When I plot the NTF and STF it seems the filter property is ok. I have also extracted the ABCD matrix to be able to simulate the system in time domain.
But I have difficulties Crying or Very sad in simulating the system in time domain. I don't know how input(s) should look like. what should be the format of the input signal(s) into this complex system and also how should I do copmlex quantization? and finally how should be the format of the output in order to window it, take fft to plot and analyze the PSD. the codes and functions I used and defined to design NTF, converting to continuous time domain and shifting the frequency and also extracting the state-space matrices ABCD are available upon request to help you more how I did in my design flow to guide me with my questions.
Hope to hear from you soon Smile