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In computer history - the creation of electronic circuits, "we saw that led to the development of radar during World War II to an understanding of pulse technology. At the same time, methods are needed to refine the calculations for the ballistic trajectory . From these beginnings, the digital computer was developed.
What is the difference in "analog" and "digital"? A few examples should. Analog is something that is similar toobvious, but you may be aware that a similar procedure or function that is equivalent or very similar to another. An analogy is often used to explain or support for understanding, a new feature in terms that are understandable.
For example, a house to house electrical circuit for operating a lamp. Power is supplied by a switch, when checking the output available, which is connected to the lamp. This can be compared to the plumber, where the water iscontrolled by a valve or faucet in the house, so the pipes that bring water into the kitchen, where the supply or can be turned off by a tap or faucet, and is available immediately. The rate of water flow can be controlled, which is similar to a dimmer the bulb.
The analogy is not necessarily the same thing, but it helps to understand the strength of those who know hydraulics.
Digital, using the number or numbers, refers to the use ofThe numbers to represent all things. How, for example, uses a digital clock click to display the time. See the numbers at first glance have traditionally been distributed all over the dial, so that your hands so that they are similar to those over time. For example, the minute hand is pointing straight down is half way between the rim of the clock, the passage of a half hour. If the pointer refers to the number 3, which means 3 hours of 12 for a full turn.When we learned when we learned that it was half past three to tell. However, the digital clock says 3:30.
Closer to our theme, we can develop the record. The vinyl was the standard support for recording and playing music since 1950, records were also developed in parallel. In these two media using a modulation, where the breadth and strength of modulation is proportional or analogous to that of the original volume of Live --Singing or playing. This music has been transformed from a microphone into an electrical signal variable, in analogy with the sound.
With the invention in 1980, the compact disc, digital techniques were used to represent the volume changes, monitored by a sampling pulse and the volume of tone. This sampling pulse is used with high frequency, so that you feel pursued and the progress of the sound. The principle is comparable with the camera, in whicha sequence of still images are displayed at a speed of 32 frames per second, so that they show how a moving image. Even a TV with a frame rate of 50 or 60 per second (actually 25 0r 30 interlaced).
The big advantage of digital recording and playback system (amplifier, etc., are also digital) that because of the nature of radio-frequency pulses, you can copy them exactly when the transfer from one medium to another, for example, CopyCD-compilation track for the CD. With an analog system, there are no losses in each transfer, so that a recording on a tape with a vinyl LP copy of a home stereo system, significantly lower quality than the original.
A computer can also be analog or digital, if the nature digital analog is far exceeded. An analog computer can be in research where it can be for example a record on a moving map of the temperature and humidity in a room to be compiled to be used,Air through a new air conditioning unit air conditioning design, the table could also screen. In any case, the chart is an analog representation of temperature and pressure.
First electronic control systems in aircraft has been exported from some form of analog computer, the amount of aileron was moved in proportion to the movement of the joystick, but not directly proportional. A calculation was made, that depends on the speed and altitude of the aircraft, and other factors. Electronic "boxes"linear amplifiers and circuits involved in the response variable, fueled by all the sensors to flight controls, etc.
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