Q.1

The logic family with the highest maximum clock frequency is HS-TTL.

  • True
  • False
Q.2

The output current capability for a HIGH output condition is called a source current.

  • True
  • False
Q.3

The time it takes for a square wave to go from 10% to 90% of its voltage level is called propagation delay.

  • True
  • False
Q.4

The TTL HIGH level source current is higher than the LOW level sinking current.

  • True
  • False
Q.5

The maximum output voltage recognized as a LOW by a TTL gate is 2.0 V.

  • True
  • False
Q.6

Power-supply decoupling uses a radio-frequency capacitor to short out high frequency spikes.

  • True
  • False
Q.7

The lower transistor of a totem-pole output is saturated when the gate output is ________.

  • overdriven
  • HIGH
  • LOW
  • malfunctioning
Q.8

When VGS = 0 on an N-channel MOSFET switch, there is no ________ between the source and the drain.

  • voltage drop
  • conductive channel
  • capacitance
  • inductance
Q.9

Fan-out for a typical TTL gate is ________.

  • 100
  • 54
  • 10
  • 4
Q.10

A logic probe is placed on the output of a digital circuit and the probe lamp is dimly lit. This display indicates ________.

  • that an open or bad logic level exists
  • a high level output
  • a high-frequency pulse train
  • that the supply voltage is low
Q.11

A logic probe is placed on the input of a digital circuit and the probe lamp blinks slowly, indicating ________.

  • that an open or bad logic level exists
  • a high level output
  • a high-frequency pulse train
  • that the supply voltage is low
Q.12

________ is about twice as fast as P-MOS.

  • CMOS
  • DMOS
  • MOD
  • N-MOS
Q.13

The 74XX series TTL operates using saturated switching in which many of the transistors, when conducting, will be in the saturated condition.

  • True
  • False
Q.14

When the outputs of several standard TTL gates are connected together, the gate outputs produce more fan-out.

  • True
  • False
Q.15

Usually P-MOS and N-MOS circuits are identical with the exception of the voltage polarities.

  • True
  • False
Q.16

Integrated injection logic offers high component density and is easier to fabricate than TTL.

  • True
  • False
Q.17

The number of gates that can be connected to a single output without exceeding the current ratings of the gate is called ________.

  • fan-out
  • propagation
  • dissipation
  • SSI
Q.18

An open-collector TTL gate ________.

  • can source current but cannot sink current
  • can sink current but cannot source current
  • cannot source or sink current
  • can sink more current than a standard TTL gate
Q.19

One advantage that MOSFET transistors have over bipolar transistors is ________.

  • high input impedance
  • higher switching speed
  • low input impedance
  • reduced propagation delay
Q.20

Integrated injection logic offers high component density and is easier to fabricate than TTL.

  • True
  • False
0 h : 0 m : 1 s