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What is the name of a semiconductor that is doped with both donor and acceptor impurities?

  • Compensated semiconductor (correct)
  • N-type semiconductor
  • P-type semiconductor
  • Intrinsic semiconductor
  • Which of these statements is TRUE about a compensated semiconductor?

  • It is always used in high-speed integrated circuits.
  • It has a lower conductivity than an intrinsic semiconductor.
  • It has a higher conductivity than an intrinsic semiconductor. (correct)
  • It is always used in low-speed integrated circuits.
  • What is the name of the hybrid parameter that is usually neglected in most circuit analysis?

  • h21
  • h22
  • h11
  • h12 (correct)
  • What is the name of the current flow in a semiconductor that is due to the applied electric field?

    <p>Drift current</p> Signup and view all the answers

    What is the movement of charge carriers in a semiconductor even without the application of electric potential called?

    <p>Diffusion current</p> Signup and view all the answers

    What is the period of an AC wave equal to?

    <p>The reciprocal of the frequency of the wave</p> Signup and view all the answers

    What is the best semiconductor material to be used for high-speed integrated circuits?

    <p>Gallium Arsenide (GaAs)</p> Signup and view all the answers

    What is the approximate propagation delay of standard TTL gates?

    <p>10 ns</p> Signup and view all the answers

    What is the increase in switching speed between the 74LS series TTL and the 74HC/HCT (High-Speed CMOS) series?

    <p>10 times faster</p> Signup and view all the answers

    What is the meaning of "fan-out" in the context of a typical TTL gate?

    <p>The number of outputs a gate can drive</p> Signup and view all the answers

    What is the primary advantage of MOSFET transistors over bipolar transistors?

    <p>Higher input impedance</p> Signup and view all the answers

    How does an open-collector TTL gate function in terms of current flow?

    <p>It can sink current but cannot source current</p> Signup and view all the answers

    What is the meaning of "tPLH" and "tPHL" in the context of propagation delay?

    <p>tPLH is the time it takes for the output to rise from LOW to HIGH; tPHL is the time it takes for the output to fall from HIGH to LOW.</p> Signup and view all the answers

    What is the name of the logic family that combines the best features of TTL and CMOS?

    <p>BiCMOS</p> Signup and view all the answers

    What is the reason why totem-pole outputs cannot be connected directly together?

    <p>It can cause excessive current flow and damage the outputs</p> Signup and view all the answers

    In which decade was the transistor invented?

    <p>1940s</p> Signup and view all the answers

    What is the drain current when the applied voltage VGS is exactly equal to the pinch-off voltage VP?

    <p>Zero</p> Signup and view all the answers

    What term is used to indicate current gain in a common-collector configuration?

    <p>Gamma</p> Signup and view all the answers

    Who invented Bakelite?

    <p>Leo Hendrik Baekeland</p> Signup and view all the answers

    In which decade was the first solid state integrated circuit demonstrated?

    <p>1950s</p> Signup and view all the answers

    Who invented the phonograph?

    <p>Thomas Edison</p> Signup and view all the answers

    In which decade was the Internet first implemented?

    <p>1960s</p> Signup and view all the answers

    Who discovered the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?

    <p>Michael Faraday</p> Signup and view all the answers

    What is the minimum energy required to dislodge an electron from its covalent bond known as?

    <p>Bandgap energy</p> Signup and view all the answers

    In a one-port circuit, what is the measure that allows simplification to a current source in parallel with an impedance?

    <p>Norton’s Theorem</p> Signup and view all the answers

    What are the two mechanisms through which charge carriers move in semiconductors?

    <p>Drift and diffusion</p> Signup and view all the answers

    What does the diffusion current density depend on?

    <p>Carrier concentration</p> Signup and view all the answers

    What condition must the gain crossover frequency satisfy to avoid oscillation?

    <p>Fall below the phase crossover frequency</p> Signup and view all the answers

    What is the topology of an amplifier that exhibits a nominal gain equal to one plus the ratio of two resistors?

    <p>Non-inverting amplifier</p> Signup and view all the answers

    What type of issue may a push-pull stage operating at high temperatures suffer from?

    <p>Thermal runaway</p> Signup and view all the answers

    What provides a sharper response when pushing a bipolar device around an op amp?

    <p>Feedback loop</p> Signup and view all the answers

    What additional requirement is needed to start oscillation in a phase shift oscillator?

    <p>The phase shift around the feedback network must be 180 degrees.</p> Signup and view all the answers

    What is the characteristic of the transfer curve that is not defined by Shockley's equation for certain devices?

    <p>The subthreshold characteristics.</p> Signup and view all the answers

    In an IC phase-shift oscillator, how should the ratio of feedback resistor Rf to resistor R1 be characterized?

    <p>Rf must be significantly higher than R1.</p> Signup and view all the answers

    What is the delay time in switching transistors described as?

    <p>The time between the input state change and output response.</p> Signup and view all the answers

    What defines the current gain of a common-base BJT configuration?

    <p>Just less than 1.</p> Signup and view all the answers

    What is the common frequency-determining component in a Wien bridge oscillator?

    <p>Both resistors and capacitors.</p> Signup and view all the answers

    What is represented by the typical value of the quality factor for crystal oscillators?

    <p>20,000.</p> Signup and view all the answers

    In what application is pulsating DC voltage commonly suitable?

    <p>Battery charger circuitry.</p> Signup and view all the answers

    What is the minimum input voltage recognized as HIGH by a TTL gate?

    <p>2.4 V</p> Signup and view all the answers

    What condition must be met for the output of an open-collector AND gate to turn the LED off?

    <p>Both inputs must be HIGH</p> Signup and view all the answers

    When are several open-collector TTL gates connected together, what is the output state?

    <p>Outputs are ANDed together</p> Signup and view all the answers

    What does a dimly lit probe lamp indicate when testing the output of a digital circuit with a logic probe?

    <p>An open or bad logic level exists</p> Signup and view all the answers

    What is a likely characteristic of the devices that require logic circuits in very small packages?

    <p>They are generally low-weight and portable.</p> Signup and view all the answers

    What will happen if the lower transistor in a totem-pole output is saturated?

    <p>The output will be LOW.</p> Signup and view all the answers

    In case of class A amplifiers, what indicates the efficiency of a transformer coupled amplifier?

    <p>The ratio of input to output power</p> Signup and view all the answers

    What is required for a standard TTL gate to source current when it is HIGH?

    <p>Must be able to source 400 uA</p> Signup and view all the answers

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