Basic DAC Techniques – 2 MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Basic DAC Techniques – 2″.

1. Which type of switches are not preferable for a simple weighted resistor DAC?
a) Bipolar Transistor
b) Voltage switches
c) MOSFET
d) All of the mentioned

2. The inverted R-2R ladder can also be operated in
a) Inverted mode
b) Current Mode
c) Voltage mode
d) Non inverted mode

3. For the given circuit find the output voltage?

Find the output voltage for the given circuit

a) -5.625v
b) -3.50v
c) -4.375v
d) -3.125v

4. Which of among the following circuit is considered to be linear?
a) Weighted Resistor type DAC
b) R-2R ladder type DAC
c) Inverter R-2R ladder DAC
d) All of the mentioned
View Answer

5. Calculate the value of LSB and MSB of a 12-bit DAC for 10v?
a) LSB =7.8mv, MSB =5v
b) LSB =9.3mv, MSB =5v
c) LSB =14.3mv, MSB =5v
d) LSB =2.4mv, MSB =5v

6. Multiplying digital to analog converters are used in
a) All of the mentioned
b) Digitally programmable filter
c) Digitally programmable oscillator
d) Digitally controlled audio attenuator

7. Multiplying DAC uses
a) Varying reference voltage
b) Varying input voltage
c) Constant reference voltage
d) Constant input voltage

8. A multiplying DAC is given a reference voltage VR = Vom cos2πft. Determine the output voltage?
a) Vo(t) = Vom sin(2πft+180o)
b) Vo(t) = Vom cos(2πft+180o)
c) Vo(t) = Vom tan(2πft+180o)
d) Vo(t) = Vom sec(2πft+180o)

9. A 10-bit D/A converter have an output range from 0-9v. Calculate the output voltage produced when the input binary number is 1110001010.
a) ±7.96v
b) -7.96v
c) 7.96v
d) None of the mentioned

10. The basic step of a 8-bit DAC is 12.4mv.If the binary input 00000000 represents 0v. Determine the output, if the input is 101101111?
a) 1.36v
b) 2.27v
c) 5.45v
d) None of the mentioned

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