1. An analog temperature sensor is used to monitor a certain process in a chemical research facility. The data from the sensor will be analyzed by a digital controller to monitor and control the chemical process. The requirements for this system are: • Highest output frequency of the sensor is 5 Hz • 60 Hz noise is present. • The range of the input voltage to the analog-to-digital converter is - 10 Volts to 10 Volts. • Input resolution error must be less than ± 50 µV (Note 1 µV= 10-6 Volts) • Reducing the noise by 95% will significantly reduce aliasing distortion. c) Determine the number of bits/sample N of the analog-to-digital converter. d) Determine the minimum required sampling rate of the analog-to-digital converter. Why?
1. An analog temperature sensor is used to monitor a certain process in a
chemical research facility. The data from the sensor will be analyzed by a
digital controller to monitor and control the chemical process. The
requirements for this system are:
• Highest output frequency of the sensor is 5 Hz
• 60 Hz noise is present.
• The range of the input voltage to the analog-to-digital converter is -
10 Volts to 10 Volts.
• Input resolution error must be less than ± 50 µV (Note 1 µV= 10-6
Volts)
• Reducing the noise by 95% will significantly reduce aliasing
distortion.
c) Determine the number of bits/sample N of the analog-to-digital
converter.
d) Determine the minimum required sampling rate of the analog-to-digital
converter. Why?
e) Does sampling the analog signal at a rate higher than the minimum
(oversampling) improve the resolution error?
f) Determine the minimum storage required (in bytes) for the controller
to store 7 days of data from the sensor.
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