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Understanding Analog Output

Are you eager to know more about analog output as well as other kinds of input/output devices in the simplest way? If yes, then you are lucky to find this article. The main content of this post is to provide knowledge for those who wish to conduct measurement control by utilizing computers and anyone who is considering automation of data measurements or even logging.

The signals from sensors measure surrounding natural factors at which include temperature, flow rate and even pressure. Typically, these are analog signals and most of it control actuators that move together with the analog signals. On the other hand, digital signals can only be monitored by using computers. It’s because of this why it is important to have access to a device that can bridge the analog signal and digital signal being monitored by the computer, in an effort to enter the signal from sensor using computer or output signal to an actuator. This bridge is also referred to as analog input/output interface.

When inputting external analog quantity to computer, there is an infinite number of numbers needed to correspond the digital quantity and this is done in the event that you want to have proper display of the quantity in digitalize form. This is not possible with computers that are capable of handling finite number of digits, even from standpoint of circuit technology that makes up the converter. Among the effective ways to solve this problem is to keep the number of digits in an acceptable range either by making use of rounding the floor or ceiling. In other words, it means that you need to replace the amount in a certain range to represent its value or otherwise known as quantization. Watch and learn more at

When quantizing analog values, it is typically represented by a solid line and you are expected to get a stepped line as well. The truth is, it’s become possible to express the analog signal using finite value. This technology is active in many things that people aren’t actually aware of. To give you an example, one perfect example of this is smart phones. These devices at can make calls and it’s through the conversion of voice from analog to digital sound.

As a matter of fact, there are two major classifications for analog input and output devices including:

Bus isolation – it uses photocoupler and it makes the external analog output and computer to be isolated.

Independent isolation – it makes use of a photocoupler as well as isolation amplifier for it to add isolation between the input/output channel.

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