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Question about A/D Converter
(a) An A/D conversion circuit with 10 bit resolution has an input range of 0-5 V. A second has a 12 bit resolution and an input range of 0-10 V. Calculate the digital output value that will represent a 2 V input for both of the A/D converters. Convert the digital levels in both cases to hexadecimal and then to binary values.
(b) Explain briefly from what you notice about the digital output values in (a) why a digital output value of an A/D converter is rarely the exact same digital value as the analogue input value.
(c) State briefly why a PLC A/D module having 4 analogue input channels would probably not incorporate 4 internal A/D circuits.
(d) State briefly which of the two digital output values in (a) is the more accurate and why.
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First you must give all different possible connection types for them and then, for each case, you should develop some tests that can define the connection type and calculate the current passing through the capacitors.
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