Automation System
How is the integral mode implemented using analog methods?

None of these
Op amp and resistors
All of these
Op amp and a capacitor
Op amp and an RC network to place the error voltage across the capacitor

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

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

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