Automation System
What two methods are available to build electronic continuous control?

Analog and digital
All of these
Analog and mechanical
Pneumatic and analog
None of these

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Automation System
D/A (digital to analog) conversion:

has to be sampled at 1/2 the highest input frequency
None of these
both (b) and (c)
results in a binary code as the final output
must be fed through a filter to reproduce the original signal accurately

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