Based on working Principle the PC can be characterized into three types:-
1. Analog PC
2. Digital PC
2. Digital PC
3. Hybrid PC
1. Analog Computer–Analog Computers works with analog signals. It is utilized to process simple information. Simple computer works by estimating as opposed to tallying. A simple computer estimates constant electrical or physical extents like voltage, pressure, water stream etc.An simple PC can acknowledge inputs which shift with time and force and straightforwardly apply them to different gadgets which perform wanted activity. It produces yield as diagram.
These computers are for the most part utilized in process control plants.
Analog computers store data of physical quantities and perform calculations. It different from digital computer. These are excellent for situations which require data to be measured directly without converting into codes. Analog computer was the earliest computer machines.
Analog computer was mostly used in scientific and industrial applications. In the year 1950 to 1960s it was used some applications like aircraft flight, teaching control systems.The disadvantage of the mechanical electrical analogy is that electronics are limited by the range over which the variables may vary thanks to the fixed supply voltage.
Electronic analog computers:
If one considers an easy mass–spring system, constructing the physical system would require making or modifying the springs and much .It would be followed by attaching them to every other and an appropriate anchor, collecting equipment with the acceptable input range, and eventually , taking measurements.
The electrical equivalent are often created with a couple of operational amplifiers (op amps) and a few passive linear components; all measurements are often taken directly with an oscilloscope. In the circuit, the (simulated) 'stiffness of the spring', for instance, can be changed by adjusting the parameters of a capacitor. The electrical system is an analogy to the physical system,so the name, but it's less costly to construct, generally safer, and typically much easier to switch.
Therefore, each problem must be scaled to its parameters and dimensions—e.g., the expected magnitudes of the speed and therefore the position of a spring pendulum.
These electric circuits can also perform a wide variety of simulations. For example, voltage can simulate water pressure and current can simulate rate of flow in terms of cubic meters per second. An integrator can provide the total accumulated volume of liquid, using an input current proportional to the flow rate.
The precision of a computer is restricted by the word size; arbitrary-precision arithmetic, while relatively slow, provides any practical degree of precision which may be needed.In most cases the precision of an analogue computer is completely sufficient given the uncertainty of the model characteristics and its technical parameters.
2. Digital Computer- Digital Computers works with digital signals. An advanced PC works legitimately on decimal digit that speaks to either discrete information or images. It changes over the information into digits and afterward all activities are done on these digits at amazingly quick rates. Digit PC fundamentally realizes how to tally the digits.
Computers utilized for business and logical application are advanced PCs.
Digital computer is a computer machine which is both an electronic computer and digital computer. A computer can perform its operations within the decimal numeration system . A digital computer isn't necessarily a transistorized computer before the arrival of the transistor.
3. Hybrid Computer – Hybrid Computers uses both Analog signals and Digital signals. Hybrid computer use the best characteristics of both simple and advanced computers. They are appropriate for circumstance where advanced preparing of information gathered in simple structure is alluring.
For instance – in a medical clinic emergency unit gadgets may quantify a patient's heart work, temperature and so forth these estimations may then be changed over into numbers and provided to advanced gadgets. Different territories are guided rocket framework new airplane plan and so forth .
Hybrid computers can be used to contain a good but relatively imprecise seed value using an analog computer front-end. Hybrid computers have the facility of a computer and, when the keyboard is detached, the portability of a tablet.
A hybrid computer is a computing system that combines both digital signals and analog signals. The digital components lookout of logical and numerical operations, additionally to serving because the controller for the system.
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