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Analog and Digital Converters

Q1:

The problems of the binary-weighted resistor digital-to-analog converter (DAC) can be overcome by using ___________.

A an 8-bit binary-weighted resistor DAC

B an R/2R ladder DAC

C a staircase DAC

D a flash DAC

ANS:B - an R/2R ladder DAC

When the number of inputs are > 4 or combinations (2^n >16) is more, the binary-weighted resistors may not be readily available. This is why are and 2R method is more preferred as it requires only two sets of precision resistance values.



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