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- Question
What is the major advantage of ECL logic?
Options- A. very high speed
- B. wide range of operating voltage
- C. very low cost
- D. very high power
- Correct Answer
- very high speed
- 1. The problem of different current requirements when CMOS logic circuits are driving TTL logic circuits can usually be overcome by the addition of:
Options- A. a CMOS inverting bilateral switch between the stages
- B. a TTL tristate inverting buffer between the stages
- C. a CMOS noninverting bilateral switch between the stages
- D. a CMOS buffer or inverting buffer Discuss
- 2. The word "interfacing" as applied to digital electronics usually means:
Options- A. a conditioning circuit connected between a standard TTL NAND gate and a standard TTL OR gate
- B. a circuit connected between the driver and load to condition a signal so that it is compatible with the load
- C. any gate that is a TTL operational amplifier designed to condition signals between NMOS transistors
- D. any TTL circuit that is an input buffer stage Discuss
- 3. What is the difference between the 74HC00 series and the 74HCT00 series of CMOS logic?
Options- A. The HCT series is faster.
- B. The HCT series is slower.
- C. The HCT series is input and output voltage compatible with TTL.
- D. The HCT series is not input and output voltage compatible with TTL. Discuss
- 4. What should be done with unused inputs to a TTL NAND gate?
Options- A. let them float
- B. tie them LOW
- C. tie them HIGH Discuss
- 5. How many 74LSTTL logic gates can be driven from a 74TTL gate?
Options- A. 10
- B. 20
- C. 200
- D. 400 Discuss
- 6. What is the static charge that can be stored by your body as you walk across a carpet?
Options- A. 300 volts
- B. 3,000 volts
- C. 30,000 volts
- D. Over 30,000 volts Discuss
- 7. Which of the following logic families has the highest maximum clock frequency?
Options- A. S-TTL
- B. AS-TTL
- C. HS-TTL
- D. HCMOS Discuss
- 8. What causes low-power Schottky TTL to use less power than the 74XX series TTL?
Options- A. The Schottky-clamped transistor
- B. Nothing. The 74XX series uses less power.
- C. A larger value resistor
- D. Using NAND gates Discuss
- 9. Which of the following statements apply to CMOS devices?
Options- A. The devices should not be inserted into circuits with the power on.
- B. All tools, test equipment, and metal workbenches should be tied to earth ground.
- C. The devices should be stored and shipped in antistatic tubes or conductive foam.
- D. All of the above. Discuss
- 10. Whenever a totem-pole TTL output goes from LOW to HIGH, a high-amplitude current spike is drawn from the Vcc supply. How is this effect corrected to a digital circuit?
Options- A. By connecting a radio-frequency capacitor from Vcc to ground.
- B. By using a switching power supply
- C. By connecting a capacitor from Vout to ground
- D. By connecting a large resistor from Vcc to Vout Discuss
Logic Families and Their Characteristics problems
Search Results
Correct Answer: a CMOS buffer or inverting buffer
Correct Answer: a circuit connected between the driver and load to condition a signal so that it is compatible with the load
Correct Answer: The HCT series is input and output voltage compatible with TTL.
Correct Answer: tie them HIGH
Correct Answer: 20
Correct Answer: Over 30,000 volts
Correct Answer: AS-TTL
Correct Answer: A larger value resistor
Correct Answer: All of the above.
Correct Answer: By connecting a radio-frequency capacitor from Vcc to ground.
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