Top 350+ Solved Digital Electronics and Logic Design MCQ Questions Answer
Q. An open-drain gate is the CMOS counterpart of
a. an open- collector ttl gate
b. a tristate ttl gate
c. a bipolar junction transistor
d. an emitter- coupled logic gate
Q. The active switching element used in all TTL circuits is the
a. bipolar junction transistor (bjt
b. field-effect transistor (fet
c. metal-oxide semiconduct or field- effect transistor (mosfet
d. unijunctio n transistor (uj)
Q. One output structure of a TTL gate is often referred to as a
a. diode
b. jbtarrangement
c. totem-pole arrangement
d. base, emitter, collector arrangeme nt
Q. An open-collector output requires
a. a pull-down resistor
b. a pull-up resistor
c. no output resistor
d. an output resistor
Q. TTL is alive and well, particularly in
a. industrial applications
b. millitary applications
c. educational applications
d. commercia lapplicatio ns
Q. A TTL NAND gate with IIL(max) of –1.6 mA per input drives eight TTL inputs. How much current does the drive output sink?
a. –12.8 ma
b. –8 ma
c. –1.6 ma
d. –25.6 ma
Q. A standard TTL circuit with a totem-pole output can sink, in the LOW state (IOL(max)),
a. 16 ma
b. 20 ma
c. 24 ma
d. 28ma
Q. It is best not to leave unused TTL inputs unconnected (open) because of TTL's
a. noise sensitivity
b. low-current requirement
c. open- collector outputs
d. tristate constructi on
Q. Which logic family combines the advantages of CMOS and TTL?
a. bicmos
b. ttl/cmos
c. ecl
d. ttl/mos
Q. Which is not part of emitter-coupled logic (ECL)?
a. differential amplifier
b. bias circuit
c. emitter- follower circuit
d. totem- pole circuit
Q. PMOS and NMOS circuits are used largely in
a. msi functions
b. lsi functions
c. diode functions
d. ttlfunctions