Digital Electronics Signals and Switches Online Test, Digital MCQ

Why does the TTL family use a totem-pole circuit on the output?

What is the frequency of a clock waveform if the period of that waveform is
1.25 μ s?

Internally, a computer’s binary data are almost always transmitted on parallel channels, commonly referred to as the:

Why is parallel data transmission preferred over serial data transmission for most applications?

With surface-mount technology (SMT), the devices should:

To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.

Why, in most applications, are transistor switches used in place of relays?

How long will it take to serially transmit the hexadecimal number C3₁₆ if the clock frequency is 1.5 MHz?

The family of logic that is composed of bipolar junction transistors is ____.

What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?

The serial format for transmitting binary information uses:

Which device(s) have almost ideal ON and OFF resistances?

A diode placed in parallel across a relay coil serves what function?

Serial communication can be sped up by:

What is the period of a clock waveform that has a frequency of 15.4 kHz?

TTL logic chips must have connections to V_cc and ground, even if all inputs and outputs are properly used and tied to valid signals.

An indication of cutoff in an NPN bipolar transistor is that the:

When an IC has two rows of parallel connecting pins, the device is referred to as a:

Normal operation of an NPN bipolar transistor requires the base to be ________ with respect to the emitter, and ________ with respect to the collector.

The abbreviation NO, when used with respect to electromechanical relays, stands for not operational.

In a graphical representation of voltage versus time, ________ is displayed on the ________ axis and ________ is displayed on the ________ axis.

What is the minimum voltage required before a diode will allow current to flow between the cathode and the anode?

What is the advantage of using serial data transmission over parallel data transmission?

A TTL totem-pole circuit is designed so that the output transistors:

What is the advantage of using CMOS logic over TTL?

What is used to graphically show the time relationship between two or more digital waveforms?

The period of a waveform is the percentage of time the signal is HIGH.

What is a disadvantage of CMOS in place of TTL?

The units for the HIGH time for a periodic wave are ________.

Precise timing is not important in digital signals.