Digital Electronics-Signals and Switches
Digital Electronics-Signals and Switches
1. Why does the TTL family use a totem-pole circuit on the output?
- It provides active pull-up.
- It provides active pull-down.
- It provides active pull-up and active pull-down.
2. What is the frequency of a clock waveform if the period of that waveform is
1.25 s?
1.25 s?
- 8 kHz
- 0.8 kHz
- 0.8 MHz
- 8 MHz
3. Internally, a computer's binary data are almost always transmitted on parallel channels, commonly referred to as the:
- parallel bus
- serial bus
- data bus
- memory bus
4. Why is parallel data transmission preferred over serial data transmission for most applications?
- It is much slower.
- It is cheaper.
- More people use it.
- It is much faster.
5. With surface-mount technology (SMT), the devices should:
- utilize transistor outline connections
- mount directly
- have parallel connecting pins
- require holes and pads
6. To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.
- negative, cathode, positive, anode
- negative, anode, positive, cathode
7. To forward bias a diode, a ________ potential is needed on the ________ and a ________ is needed on the ________.
- negative, cathode, positive, anode
- negative, anode, positive, cathode
8. Why, in most applications, are transistor switches used in place of relays?
- They consume less power.
- They are faster.
- They are quieter and smaller.
- all of the above
9. The family of logic that is composed of bipolar junction transistors is ____.
- TTL
- CMOS
- DIP
- BJT
10. What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?
- total isolation
- faster
- higher current rating
- total isolation and higher current rating