Electronics

Electronics

1. Scientists at Bell Laboratories invented the transistor.

2. Similar to electrochemical cells, electrons enter the vacuum through the cathode and leave though the anode.

3. Edison´s bulb allowed current to freely flow in one direction but blocked its movement in the other direction.

4. X-ray tube: A cathode-ray tube designed to generate x-ray.

5. De Forest´s invention of the triode made modern electronics devices possible.

6. A semiconductor is a material that is neither a good conductor nor a good insulator.

7. The wafer is coated with althernating layer of three basic ¨raw material¨:

   • An insulating material (such as silicon dioxide)
   • A semiconducting material (such as polysilicon a, form of silicon.)
   • A conducting material ( such as aluminum or copper)

8. The most common semiconductor laser is made of semiconductor called gallium arsenide.

9. Integated circuits are much cheaper to manufacture than separate components.

10. A second advantage of integrated circuits is that they are much more reliable than separated components.

11. The effects of the integrated-circuit revolution are far greater than the effects of the transistor revolution.

12. Analog data can have any possible value within a specidied range.

13. Machine language is just a sequence of binary numbers.

14. Computers provide rapid data processing and data transfer that are induspensable to modern society.