Question
Download Solution PDFConsider the situation where a microprocessor gives an output of an 8-bit word. This is fed through an 8-bit digital-to-analog converter to a control valve. The control valve requires 6.0 V being fully open. If the fully open state is indicated by 11111111, the output to the valve for a change of 1-bit will be
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCalculation:
For an 8-bit digital to analog converter, there will be 28 combinations.
‘11111111’ is the 256th combination which is a fully open state.
Given the control valve requires 6.0 V to be fully open.
The full-scale output voltage of 6.0 V will be divided into 256 intervals.
The change in the output voltage by a change of 1 bit will be
\(256 \ bits \rightarrow 6 \ V \)
\(1 \ bit \rightarrow \frac {6}{256} = 0.023 \ V\)
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