1.A disadvantage of DTL is ___________
a) The input transistor to the resister
b) The input resister to the transistor
c) The increased fan-in
d) The increased fan-out
Explanation: A disadvantage of DTL is the input resistor to the transistor and its presence tends to slow the circuit down. Hence limiting the speed at which the transistor is able to switch states. Thus, the propagation delay increases.
2. 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
Explanation: Transistor–transistor logic (TTL) is a class of digital circuits built from bipolar junction transistors (BJT) and resistors. However, resistors have a small role to play and both logic gating and amplifying functions are performed by the transistors.
3. TTL is called transistor–transistor logic because both the logic gating function and the amplifying function are performed by ____________
a) Resistors
b) Bipolar junction transistors
c) One transistor
d) Resistors and transistors respectively
Explanation: TTL is called transistor–transistor logic because both the logic gating function and the amplifying function are performed by bipolar junction transistors (BJTs).
4.TTL was invented in 1961 by ____________
a) Baker clamp
b) James L. Buie
c) Chris Brown
d) Frank Wanlass
Explanation: TTL was invented in 1961 by James L Buie
5. 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
Explanation: The full form of TCTL is transistor-coupled transistor logic.
6. The _______ ancestor to the first personal computers.
a) PARAM 1
b) SATYAM 1
c) KENBAK 1
d) MITS Altair
Explanation:The KENBAK 1, ancestor to the first personal computers.
7. TTL inputs are the emitters of a ____________
a) Transistor-transistor logic
b) Multiple-emitter transistor
c) Resistor-transistor logic
d) Diode-transistor logic
Explanation: TTL inputs are the emitters of a multiple-emitter transistor.
8. TTL is a ____________
a) Current sinking
b) Current sourcing
c) Voltage sinking
d) Voltage sourcing
Explanation: Like DTL, TTL is a current-sinking logic since a current must be drawn from inputs to bring them to a logic 0 level. Current Sink means it accepts current coming out from a source.
9. Standard TTL circuits operate with a __ volt power supply.
a) 2
b) 4
c) 5
d) 3
Explanation: Standard TTL circuits operate with a 5-volt power supply.
10. TTL devices consume substantially ______ power than equivalent CMOS devices at rest.
a) Less
b) More
c) Equal
d) Very High
Explanation: TTL devices consume substantially more power than equivalent CMOS devices at rest. Thus, CMOS devices are faster than TTL devices.