Integrated Circuit Technologies problems
- 1. 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?
Options- A. ?12.8 mA
- B. ?8 mA
- C. ?1.6 mA
- D. ?25.6 mA Discuss
Correct Answer: ?12.8 mA
- 2. The greater the propagation delay, the ________.
Options- A. lower the maximum frequency
- B. higher the maximum frequency
- C. maximum frequency is unaffected
- D. minimum frequency is unaffected Discuss
Correct Answer: lower the maximum frequency
- 3. Most TTL logic used today is some form of ________.
Options- A. Schottky TTL
- B. tristate TTL
- C. low-power TTL
- D. open-collector TTL Discuss
Correct Answer: Schottky TTL
- 4. Which logic family combines the advantages of CMOS and TTL?
Options- A. BiCMOS
- B. TTL/CMOS
- C. ECL
- D. TTL/MOS Discuss
Correct Answer: BiCMOS
- 5. Which is not part of emitter-coupled logic (ECL)?
Options- A. Differential amplifier
- B. Bias circuit
- C. Emitter-follower circuit
- D. Totem-pole circuit Discuss
Correct Answer: Totem-pole circuit
- 6. Which transistor element is used in CMOS logic?
Options- A. FET
- B. MOSFET
- C. Bipolar
- D. Unijunction Discuss
Correct Answer: MOSFET
- 7. Which is not a MOSFET terminal?
Options- A. Gate
- B. Drain
- C. Source
- D. Base Discuss
Correct Answer: Base
- 8. Which equation is correct?
Options- A. VNL = VIL(max) + VOL(max)
- B. VNH = VOH(min) + VIH(min)
- C. VNL = VOH(min) ? VIH(min)
- D. VNH = VOH(min) ? VIH(min) Discuss
Correct Answer: VNH = VOH(min) ? VIH(min)
- 9. A standard TTL circuit with a totem-pole output can sink, in the LOW state (IOL(max)), ________.
Options- A. 16 mA
- B. 20 mA
- C. 16 µA
- D. 20 µA Discuss
Correct Answer: 16 mA
- 10. It is best not to leave unused TTL inputs unconnected (open) because of TTL's ________.
Options- A. noise sensitivity
- B. low-current requirement
- C. open-collector outputs
- D. tristate construction Discuss
Correct Answer: noise sensitivity
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