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DIGITAL ELECTRONICS - LOGIC CIRCUITS - 1 | |
V. Ryan © 2003 | |
Most modern electronic devices such as mobile
telephones and computers depend on digital electronics. In fact, most
electronics about the home and in industry depend on digital electronics
to work. |
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A good example of a digital electronic system is a mobile phone. As you speak into the phone, the digital electronic circuits it contains converts your voice into a series of electronic pulses (or 1s and 0s). These are transmitted and the receiving mobile phone then converts the digital pulses back into your voice. Digital circuits are used because they are efficient and work well, also, digital signals are easier to transmit than actual sound (for example a persons voice). |
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The various parts of a computer communicate through the use of electronic pulses (1s and 0s). Consequently digital logic circuits are ideal for the internal electronics. The main part of the computer is the motherboard. This is a complex piece of electronics that processes all the important data. For instance, when word processing, it is very important to display letters and words on the monitor. The motherboard generates the individual letters on the monitor by sending a series of 1s and 0s to the screen. (For more information regarding digital signals see computer control) |
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When the computer operator presses the letter ‘H’ on
the keyboard, the motherboard converts this into a digital signal
composed of 1s and 0s.
The ‘H’ in the form of 1s and
0s is displayed on the monitor. |
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QUESTION: Look closely at a computer monitor. The pixels are very small but you may be able to see them especially if you use a magnifying glass. If you are looking at a colour picture, the pixels will be in different colours, not only black and white. |
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