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DESIGN AND REPORT REQUIRED
A strain gauge is used in Wheatstone Bridge configuration. The output from the Wheatstone Bridge varies from zero to a maximum strain output of 12V, that is it is in the positive quadrant.
You are required to convert this 0 -12 V analog signal into a 12 bit digital signal (Analog to Digital Conversion, ADC). The maximum frequency of the analog signal is 20 KHz (this governs the Nyquist sampling rate).
• The relationship between the analog value of the digital signal and the input analog signal is such that it obeys the square law. The functional relationship is exhibited by the digital step having a greater sensitivity at the low voltage levels than at the higher voltage level (the analog equivalent of the digital step is smaller at the lower voltage levels than at the higher voltage levels).
• The resultant digital signal is also converted to the Gray code in that only one bit is to change for each quantisation level chan...
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