A student has made a 3-bit binary down counter and connected

Home » Analog Circuits » Analog circuits miscellaneous » Question

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 given below to generate a staircase waveform. The output achieved is different as shown in figure. What could be the possible cause of this error?

1. The resistance values are incorrect
2. The counter is not working properly
3. The connection from the counter to DAC is not proper
4. The R and 2R resistances are interchanged

Correct Option: C

NA