Digital Circuits Questions and Answers – Diode-Transistor Logic(DTL)

This set of Digital Electronics/Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Diode-Transistor Logic(DTL)”.

1. Diode–transistor logic (DTL) is the direct ancestor of _____________
a) Register-transistor logic
b) Transistor–transistor logic
c) High threshold logic
d) Emitter Coupled Logic

2. In DTL logic gating function is performed by ___________
a) Diode
b) Transistor
c) Inductor
d) Capacitor

3. In DTL amplifying function is performed by ___________
a) Diode
b) Transistor
c) Inductor
d) Capacitor

4. How many stages a DTL consist of?
a) 2
b) 3
c) 4
d) 5

5. The full form of CTDL is ___________
a) Complemented transistor diode logic
b) Complemented transistor direct logic
c) Complementary transistor diode logic
d) Complementary transistor direct logic

6. The DTL propagation delay is relatively ___________
a) Large
b) Small
c) Moderate
d) Negligible

7. The way to speed up DTL is to add an across intermediate resister is ___________
a) Small “speed-up” capacitor
b) Large “speed-up” capacitor
c) Small “speed-up” transistor
d) Large ” speed-up” transistor

8. The process to avoid saturating the switching transistor is performed by ___________
a) Baker clamp
b) James R. Biard
c) Chris Brown
d) Totem-Pole

9. A major advantage of DTL over the earlier resistor–transistor logic is the ___________
a) Increased fan out
b) Increased fan in
c) Decreased fan out
d) Decreased fan in

10. To increase fan-out of the gate in DTL ___________
a) An additional capacitor may be used
b) An additional resister may be used
c) An additional transistor and diode may be used
d) Only an additional diode may be used

11. 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

Answer: b
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.

« Prev – Digital Circuits Questions and Answers – Register-Transistor Logic(RTL)
» Next – Digital Circuits Questions and Answers – Transistor Transistor Logic(TTL)

Related posts

• Number System – 1 (0)
• Digital Circuits Questions and Answers – Transistor Transistor Logic(TTL) (0)
• Digital Circuits Questions and Answers – Sum of Products and Products of Sum (0)
• Digital Circuits Questions and Answers – Register-Transistor Logic(RTL) (0)
• Digital Circuits Questions and Answers – Quine McCluskey (0)