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Q#1 Data Converters GATE EE 2006 MCQ +2 marks -0.66 marks

A student has made a 3-bit binary down counter and connected to the R- 2R ladder type DAC [Gain = (-1 kΩ/2R)] as shown in figure to generate a staircase waveform.  The output achieved is different as shown in figure.  What could be the possible cause of this error?

 

The resistance values are incorrect

The counter is not working properly

The connection from the counter to DAC is not proper

The R and 2R resistances are interchanged

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