In digital instrumentation system, especially in digital electronics, digital computers have taken a major role in near every aspect of life in our modern world.
Digital electronics is at the heart of computers, but there are many direct applications of digital electronics.
Since computers are electronics devices, all the information they work with has to be digitally formatted.
That's why we need digital signal conditioning to condition process-control signal to be an approximated digital format.
[1] Digital signal conditioning in process control means finding a way to represent analog process information in digital format.
[2] Use of in control system is particularly valuable number of other reasons, however: The use of digital techniques in process control system hat process variable measurements and control information be encoded into a digital form.
Digital signals themselves are simply two-scale (binary)[3] These levels may be represented in many ways.
Given the simple binary information that is carried by signal digital, it is clear that multiple signals must be used to describe analog information.
Generally, this is done by using an assemblage of digital levels to construct a binary number, often called a word.
The individual digital levels are referred to as bits of the word.
Thus, for example, a 6-bit word consists of six independent digital levels, such as
, which can be thought of as a six-digit base 2 number.
An important consideration, then, is how the analog information is encoded into this digital word.
One of the most common schemes for encoding analog into s digital words is to use the straight counting of decimal (or base 10) and binary numbers representations.
Find the base 10 equivalent of the binary whole number
As in the base 10 system, zero preceding the first significant digit do not contribute.
, decimal equivalent can be computed as follows: