Digital Logic Families - Electronic Engineering (MCQ) questions & answers

1)   Suppose that the digital IC family has a fan out of 6. It implies that the gate can supply the current to _______ of same family.

a. 6 inputs
b. 6 outputs
c. 12 nodes
d. 12 branches
Answer  Explanation 

ANSWER: 6 inputs

Explanation:
No explanation is available for this question!
2)   If power dissipation and propagation delay in a logic circuit are estimated to be 55mW and 20ns respectively, what will be its figure of merit?

a. 1.10 nanojoule
b. 1.65 nanojoule
c. 2.50 nanojoule
d. 5.5 nanojoule
Answer  Explanation 

ANSWER: 1.10 nanojoule

Explanation:
No explanation is available for this question!
3)   What does the diode D3  represents in the equivalent circuit of Multiple Emitter Transistor shown below?

a. Base to emitter junction
b. Collector to base junction
c. Collector to emitter junction
d. Emitter to emitter junction
Answer  Explanation 

ANSWER: Collector to base junction

Explanation:
No explanation is available for this question!
4)   What should be the value of input voltage for an efficient operation of a logic circuit by avoiding the conditions of invalid voltage levels?

a. Lower than VIL (max)
b. Higher than VIH (min)
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!
5)   What is the standard percentage level used for measuring the propagation delay between the points corresponding to the inverter diagram shown below?

a. 20%
b. 50%
c. 70%
d. 100%
Answer  Explanation 

ANSWER: 50%

Explanation:
No explanation is available for this question!
6)   If a high logic output drives a logic circuit input, which among the below specified reasons will be responsible in causing a voltage drop into an invalid state?

a. Positive noise spike greater than VNL
b. Positive noise spike less than VNL
c. Negative noise spike greater than VNH
d. Negative noise spike less than VNH
Answer  Explanation 

ANSWER: Negative noise spike greater than VNH

Explanation:
No explanation is available for this question!
7)   From where do the voltage noise get induced into the logic circuit?

a. From a gate output to load
b. From the connecting wires used between two gates
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!
8)   Which type of output current flows towards or into the output terminal in a logic circuit?

a. Sourcing current
b. Sinking current
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Sinking current

Explanation:
No explanation is available for this question!
9)   Which type of unipolar logic family exhibits its usability for the applications requiring low power consumption?

a. PMOS
b. NMOS
c. CMOS
d. All of the above
Answer  Explanation 

ANSWER: CMOS

Explanation:
No explanation is available for this question!
10)   Which among the bipolar logic families is specifically adopted for high speed applications?

a. Diode Transistor Logic (DTL)
b. Transistor Transistor Logic (TTL)
c. Emitter Coupled Logic (ECL)
d. Integrated Injection Logic (I2L)
Answer  Explanation 

ANSWER: Emitter Coupled Logic (ECL)

Explanation:
No explanation is available for this question!

Related Content

▲