Compatibility or Interfacing MCQ’s

Digital Circuits Electronics & Communication Engineering

This set of Digital Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Compatibility or Interfacing”.

1. The method of connecting a driving device to a loading device is known as ___________
a) Compatibility
b) Interface
c) Sourcing
d) Sinking

2. The first CML logic was introduced by General Electric in ___________
a) 1960
b) 1981
c) 1961
d) 1990

3. Compatibility refers to ____________
a) The output of a circuit should match with the input of another circuit
b) The output of a circuit should match with the input of the same circuit
c) The input of a circuit should match with the output of another circuit
d) The input of a circuit should match with the output of same circuit

4. Commercial ECL families are not nearly as popular as TTL and CMOS mainly because they ___________
a) Produces too much noise
b) Consume too much power
c) Have high fan-in
d) Have high fan-out

5. Schottky families prevent the saturating using ___________
a) Transistors
b) Schottky transistors
c) Diodes
d) Schottky diodes

6. The full form of MECL is ___________
a) Mono emitter coupled logic
b) Motorola emitter coupled logic
c) Motorola emitter capacitor logic
d) Both mono emitter and motorola coupled logic

7. The key to propagation delay in bipolar logic family is to prevent the transistors in a gate from ___________
a) Fan-in
b) Fan-out
c) Saturation
d) Cut-off

8. The basic idea of basic CML circuit came from an ___________
a) Inverter
b) Buffer
c) Transistor
d) Both inverter and buffer

9. Motorola has offered MECL circuits in ______ logic families.
a) 3
b) 4
c) 5
d) 6

10. All input of NOR as low produces result as ___________
a) Low
b) Mid
c) High
d) High Impedance

11. The latest entrant to the ECL family is ___________
a) ECL 10K
b) ECL 100K
c) ECL 1000K
d) ECL 10000K

12. In RTL NOR gate, the output is at logic 1 only when all the inputs are at ___________
a) logic 0
b) logic 1
c) +10v
d) floating

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