KrisUK
Newbie level 4
ADC questions
I was going through an old exam paper to practice for an upcoming exam and I had a question on a PCM system. I know how a PCM system works but the questions are a little about my head:
The ADC has the following spec:
Resolution - 10 bits
Conversion Rate - 2 micro seconds
Input Voltage Range - 0V-5V
Power Dissipation - 875mV
1. Calculate the quantisation error for the ADC.
2. What is the binary number at the output of the ADC when the input voltage is 0.2V?
3. Clock A (clock leading into the sampling gate) has a frequency of 6kHz and Clock B (clock leading into PISO register) has a frequency of 1MHz.
a) What is the highest analogue input frequency which the system can reliably handle?
b) How long does iut take the PISO register to output one 10 bit sample from the ADC?
c) Calculate the period of clock A.
d) Use your answers from b) and c) to calculate how many PCM transmitters identical to the one in this question could be combined using TDM onto one communication link.
Not too sure on any of them or how to do them.
Also have on question on a simple radio receiver.
I have an inductor rated at 10mH and a variable capacitor set at 40pF.
Calculate the resonant frequency of the tuned circuit.
Thanks for any help.
I was going through an old exam paper to practice for an upcoming exam and I had a question on a PCM system. I know how a PCM system works but the questions are a little about my head:
The ADC has the following spec:
Resolution - 10 bits
Conversion Rate - 2 micro seconds
Input Voltage Range - 0V-5V
Power Dissipation - 875mV
1. Calculate the quantisation error for the ADC.
2. What is the binary number at the output of the ADC when the input voltage is 0.2V?
3. Clock A (clock leading into the sampling gate) has a frequency of 6kHz and Clock B (clock leading into PISO register) has a frequency of 1MHz.
a) What is the highest analogue input frequency which the system can reliably handle?
b) How long does iut take the PISO register to output one 10 bit sample from the ADC?
c) Calculate the period of clock A.
d) Use your answers from b) and c) to calculate how many PCM transmitters identical to the one in this question could be combined using TDM onto one communication link.
Not too sure on any of them or how to do them.
Also have on question on a simple radio receiver.
I have an inductor rated at 10mH and a variable capacitor set at 40pF.
Calculate the resonant frequency of the tuned circuit.
Thanks for any help.