Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. The logic 0 level of a CMOS logic device is approximately
a. 1.2 volts
b. 0.4 volts
c. 5 volts
d. 0 volts
Q. What is unique about TTL devices such as the 74SXX?
a. these devices use schottky transistors and diodes to prevent them from going into saturation; this results in faster turn-on and turn-off times, which translates into higher frequency operation.
b. the gate transistors are silicon (s), and the gates therefore have lower values of leakage current.
c. the s denotes the fact that a single gate is present in the ic rather than the usual package of 2–6 gates.
d. the s denotes a slow version of the device, which is a consequen ce of its higher power rating.
Q. Which of the following logic families has the shortest propagation delay?
a. cmos
b. bicmos
c. ecl
d. 74sxx
Q. Why must CMOS devices be handled with care?
a. so they don’t get dirty
b. because they break easily
c. because they can be damaged by static electricity discharge
d. all of above