ckck20
Member level 1
Hi, I have the following problems:
1)We have an A/D converter. The analog signals have a maximum change of 2.5V/μs (2.5 V per 10^-6 second). The sampling frequency is 200KHz.The conversion range is from -2.5V to 2.5V and also the converter has 8 bits. Calculate the needed holding time of the S/H (sample and hold) and the conversion time of the A/D.
2)An A/D converter system has a conversion range from -12V to 12V and 10bits.
The system has S/H and an 8input multiplexer. The maximum frequency of the input signal is 4KHz and the sampling frequency is 20KHz per input. Calculate the needed holding time of the S/H and the conversion time of the A/D.
Please, tell me what to do. I have exams on Monday and the book I'm studuying doesn't doesn't say anything on these except that for a bipolar converter
f<=1/(2*pi*Dt*2^n) where f is the frequency of the input signal, n is the number of bits and Dt is the A/D conversion time or the S/H holding time.
Anything is appreciated.
Thanks in advance
1)We have an A/D converter. The analog signals have a maximum change of 2.5V/μs (2.5 V per 10^-6 second). The sampling frequency is 200KHz.The conversion range is from -2.5V to 2.5V and also the converter has 8 bits. Calculate the needed holding time of the S/H (sample and hold) and the conversion time of the A/D.
2)An A/D converter system has a conversion range from -12V to 12V and 10bits.
The system has S/H and an 8input multiplexer. The maximum frequency of the input signal is 4KHz and the sampling frequency is 20KHz per input. Calculate the needed holding time of the S/H and the conversion time of the A/D.
Please, tell me what to do. I have exams on Monday and the book I'm studuying doesn't doesn't say anything on these except that for a bipolar converter
f<=1/(2*pi*Dt*2^n) where f is the frequency of the input signal, n is the number of bits and Dt is the A/D conversion time or the S/H holding time.
Anything is appreciated.
Thanks in advance