2. It is often necessary to acquire data from several analogue input channels. Describe how a simple addition to the above data acquisition system can convert it to a system which can digitise four input channels of data and yet use only one ADC unit. (There will be a corresponding reduction in the sampling rate for each channel).

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ISBN:9780133923605
Author:Robert L. Boylestad
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1. The diagram below shows a typical data acquisition system where an analogue
signal from a transducer is converted to a digital form suitable for subsequent
digital signal processing.
Electrical
Physical
variable
signal
(analogue)
Digital
output
S/H
ADC
Transducer
Sample-and-Hold
Transcribed Image Text:1. The diagram below shows a typical data acquisition system where an analogue signal from a transducer is converted to a digital form suitable for subsequent digital signal processing. Electrical Physical variable signal (analogue) Digital output S/H ADC Transducer Sample-and-Hold
2. It is often necessary to acquire data from several analogue input channels.
Describe how a simple addition to the above data acquisition system can
convert it to a system which can digitise four input channels of data and yet
use only one ADC unit. (There will be a corresponding reduction in the
sampling rate for each channel).
Transcribed Image Text:2. It is often necessary to acquire data from several analogue input channels. Describe how a simple addition to the above data acquisition system can convert it to a system which can digitise four input channels of data and yet use only one ADC unit. (There will be a corresponding reduction in the sampling rate for each channel).
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