E6C01:

What is the function of hysteresis in a comparator?

  1. To prevent input noise from causing unstable output signals
  2. To allow the comparator to be used with AC input signals
  3. To cause the output to change states continually
  4. To increase the sensitivity

E6C02:

What happens when the level of a comparator's input signal crosses the threshold?

  1. The IC input can be damaged
  2. The comparator changes its output state
  3. The comparator enters latch-up
  4. The feedback loop becomes unstable

E6C03:

What is tri-state logic?

  1. Logic devices with 0, 1, and high impedance output states
  2. Logic devices that utilize ternary math
  3. Low power logic devices designed to operate at 3 volts
  4. Proprietary logic devices manufactured by Tri-State Devices

E6C04:

What is the primary advantage of tri-state logic?

  1. Low power consumption
  2. Ability to connect many device outputs to a common bus
  3. High speed operation
  4. More efficient arithmetic operations

E6C05:

What is an advantage of CMOS logic devices over TTL devices?

  1. Differential output capability
  2. Lower distortion
  3. Immune to damage from static discharge
  4. Lower power consumption

E6C06:

Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?

  1. Larger bypass capacitors are used in CMOS circuit design
  2. The input switching threshold is about two times the power supply voltage
  3. The input switching threshold is about one-half the power supply voltage
  4. Input signals are stronger

E6C07:

What best describes a pull-up or pull-down resistor?

  1. A resistor in a keying circuit used to reduce key clicks
  2. A resistor connected to the positive or negative supply line used to establish a voltage when an input or output is an open circuit
  3. A resistor that insures that an oscillator frequency does not drive lower over time
  4. A resistor connected to an op-amp output that only functions when the logic output is false

E6C08:

In Figure E6-5, what is the schematic symbol for a NAND gate?

  1. 1
  2. 2
  3. 3
  4. 4
Circuit Diagram

E6C09:

What is a Programmable Logic Device (PLD)?

  1. A device to control industrial equipment
  2. A programmable collection of logic gates and circuits in a single integrated circuit
  3. Programmable equipment used for testing digital logic integrated circuits
  4. An algorithm for simulating logic functions during circuit design

E6C10:

In Figure E6-5, what is the schematic symbol for a NOR gate?

  1. 1
  2. 2
  3. 3
  4. 4
Circuit Diagram

E6C11:

In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?

  1. 2
  2. 4
  3. 5
  4. 6
Circuit Diagram

E6C12:

What is BiCMOS logic?

  1. A logic device with two CMOS circuits per package
  2. A FET logic family based on bimetallic semiconductors
  3. A logic family based on bismuth CMOS devices
  4. An integrated circuit logic family using both bipolar and CMOS transistors

E6C13:

Which of the following is an advantage of BiCMOS logic?

  1. Its simplicity results in much less expensive devices than standard CMOS
  2. It is totally immune to electrostatic damage
  3. It has the high input impedance of CMOS and the low output impedance of bipolar transistors
  4. All of these choices are correct

E6C14:

What is the primary advantage of using a Programmable Gate Array (PGA) in a logic circuit?

  1. Many similar gates are less expensive than a mixture of gate types
  2. Complex logic functions can be created in a single integrated circuit
  3. A PGA contains its own internal power supply
  4. All of these choices are correct