Deck 3: CMOS, ECL, SCFL, Lvpecl, and TTL Logic Circuits

Question 1

Two important characteristics of CMOS devices are                          

A)high noise immunity
B)low static power consumption
C)high resistivity
D)both high noise immunity and low static power consumption

Answer 1

both high noise immunity and low static power consumption

Question 2

CMOS behaves as a/an                          

A)adder
B)subtractor
C)inverter
D)comparator

Answer 2

inverter

Question 3

An important characteristic of a CMOS circuit is the                          

A)noise immunity
B)duality
C)symmetricity
D)noise margin

Answer 3

duality

Question 4

CMOS logic dissipates power than NMOS logic circuits.

A)more
B)less
C)equal
D)very high

Question 5

Semiconductors are made of                          

A)ge and si
B)si and pb
C)ge and pb
D)pb and au

Question 6

Which chip were the first RTC and CMOS RAM chip to be used in early IBM computers, capable of storing a total of 64 bytes?

A)the samsung 146818
B)the samsung 146819
C)the motorola 146818
D)the motorola 146819

Question 7

The full form of ECL is                      

A)emitter-collector logic
B)emitter-complementary logic
C)emitter-coupled logic
D)emitter-cored logic

Question 8

Which logic is the fastest of all the logic families?

A)ttl
B)ecl
C)htl
D)dtl

Question 9

Sometimes ECL can also be named as                      

A)eel
B)cel
C)cml
D)ccl

Question 10

In an ECL the output is taken from                      

A)emitter
B)base
C)collector
D)junction of emitter and base

Question 11

The ECL behaves as                      

A)not gate
B)nor gate
C)nand gate
D)and gate

Question 12

In ECL the fanout capability is                      

A)high
B)low
C)zero
D)sometimes high and sometimes low

Question 13

ECL's major disadvantage is that  

A)it requires more power
B)it's fanout capability is high
C)it creates more noise
D)it is slow

Question 14

The full form of SCFL is                      

A)source-collector logic
B)source-coupled logic
C)source-complementary logic
D)source cored logic

Question 15

The equivalent of emitter-coupled logic made out of FETs is called                      

A)cml
B)scfl
C)fecl
D)efcl

Question 16

ECL was invented in by                      

A)1956, baker clamp
B)1976, james r. biard
C)1956, hannon s. yourke
D)1976, yourke

Question 17

At the time of invention, an ECL was called as                      

A)source-coupled logic
B)current mode logic
C)current-steering logic
D)emitter-coupled logic

Question 18

The ECL circuits usually operates with                      

A)negative voltage
B)positive voltage
C)grounded voltage
D)high voltage

Question 19

Low-voltage positive emitter-coupled logic (LVPECL) is a power optimized version of

A)ecl
B)vecl
C)pecl
D)lecl

Question 20

Transistor-transistor logic (TTL) is a class of digital circuits built from                          

A)jfet only
B)bipolar junction transistors (bjt)
C)resistors
D)bipolar junction transistors (bjt) and resistors

Question 21

TTL was invented in 1961 by                          

A)baker clamp
B)james l. buie
C)chris brown
D)frank wanlass

Question 22

The full form of TCTL is                          

A)transistor-coupled transistor logic
B)transistor-capacitor transistor logic
C)transistor-complemented transistor logic
D)transistor-complementary transistor logic

Question 23

The ancestor to the first personal computers.

A)param 1
B)satyam 1
C)kenbak 1
D)mits altair

Question 24

TTL inputs are the emitters of a                          

A)transistor-transistor logic
B)multiple-emitter transistor
C)resistor-transistor logic
D)diode-transistor logic

Question 25

TTL is a                          

A)current sinking
B)current sourcing
C)voltage sinking
D)voltage sourcing