Download Aptitude Crack
img not found img not found

Basic Op-Amp Circuits

Q1: A digital-to-analog converter is an application of the

A scaling adder

B voltage-to-current converter

C noninverting amplifier

D adjustable bandwidth circuit

ANS:A - scaling adder

DAC has the same circuit as that of the scaling adder where each input is multiplied by the ratio of the feedback resistance to input resistance which determines its value, for example, bit 0 has Rin = 8R, bit 1 has Rin = 4R and Rf = feedback resistance = R.

Then, Vo = Rf(Vin1/Rin1 +Vin2/Rin2),
Vo = R(Vin1/8R+Vin2/4R) = (Vin1)/8 + (Vin2)/4 representing a digital signal 10 as an analog signal.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.