Integrated-Circuit Logic Families

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Q. In which logic family would you expect to find the lowest propagation delay?
  • A. TTL
  • B. CMOS
  • C. ECL
  • D. BiCMOS
Q. In which logic family would you find the term 'fast' commonly associated?
  • A. TTL
  • B. CMOS
  • C. ECL
  • D. BiCMOS
Q. In which logic family would you typically find a Schmitt trigger?
  • A. TTL
  • B. CMOS
  • C. ECL
  • D. BiCMOS
Q. What does the 'LS' in '74LS00' stand for?
  • A. Low Speed
  • B. Low Power Schottky
  • C. Low Signal
  • D. Logic Standard
Q. What does the term 'fan-out' refer to in digital logic circuits?
  • A. The number of inputs a gate can drive
  • B. The number of outputs a gate can have
  • C. The maximum load a gate can handle
  • D. The distance between gates
Q. What is the main disadvantage of using CMOS logic?
  • A. High power consumption
  • B. Complex design
  • C. Susceptibility to noise
  • D. Slower than TTL
Q. What is the main purpose of using pull-up resistors in TTL circuits?
  • A. To increase speed
  • B. To ensure a defined logic level
  • C. To reduce power consumption
  • D. To improve noise immunity
Q. What is the primary advantage of CMOS logic over TTL logic?
  • A. Higher speed
  • B. Lower power consumption
  • C. Greater noise immunity
  • D. Simpler design
Q. What is the primary advantage of CMOS logic over TTL?
  • A. Higher speed
  • B. Lower power consumption
  • C. Greater noise immunity
  • D. Simpler design
Q. What is the primary function of a buffer in digital circuits?
  • A. To increase signal strength
  • B. To decrease signal strength
  • C. To perform logic operations
  • D. To store data
Q. What is the primary reason for using BiCMOS technology?
  • A. Low cost
  • B. High speed and low power
  • C. Simplicity
  • D. High power consumption
Q. What is the typical input impedance of CMOS logic gates?
  • A. Low
  • B. Medium
  • C. High
  • D. Variable
Q. What is the typical supply voltage for standard TTL logic circuits?
  • A. 3.3V
  • B. 5V
  • C. 12V
  • D. 15V
Q. What is the typical voltage level for a logic high in TTL logic?
  • A. 0V
  • B. 2.5V
  • C. 5V
  • D. 12V
Q. Which logic family is best suited for battery-operated devices?
  • A. TTL
  • B. CMOS
  • C. ECL
  • D. BiCMOS
Q. Which logic family is known for its high noise immunity?
  • A. TTL
  • B. CMOS
  • C. ECL
  • D. BiCMOS
Q. Which logic family is known for its high-speed operation?
  • A. CMOS
  • B. TTL
  • C. ECL
  • D. BiCMOS
Q. Which of the following is a characteristic of TTL logic families?
  • A. High input impedance
  • B. Low power consumption
  • C. Faster switching speeds
  • D. Higher power consumption
Q. Which of the following is a disadvantage of CMOS technology?
  • A. Higher power consumption
  • B. Slower speed
  • C. More complex fabrication
  • D. Susceptibility to noise
Q. Which of the following is a feature of ECL (Emitter Coupled Logic)?
  • A. Low power consumption
  • B. High speed
  • C. High noise margin
  • D. Low cost
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