Digital and Analog Computer

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Digital Computer:

• A digital computer uses distinct values to represent the data internally.
• All information are represented using the digital 0's and 1's.
• Digital signal represents particular state that is: 0 (low) or 1 (high), yes or No, On or OFF, True or False.
• These systems store and process the data in digital form (string of 0's and 1's).
• They are capable of processing analog signals but the analog signals have to be converted into digital signals using an ADC before feeding into the digital computer.

Analog Computer:

• Analog computer is another kind of a computer that represents data as variable across a continuous rang of values.
• Analog computers are used for measuring of parameters that vary continuously in real time, such as temperature, pressure and voltage.
• Analogue computers are used in hospital to measure the size of stone in kidney and mental disease diagnostics (CT scan with photos).
• These computer use OP-AMP (Operational Amplifier).
• Examples Seismograph

Hybrid Computer:

• These computers are a combination of both digital and analog computers.
• Hybrid computers are computers that exhibit features of analog computer and digital computers.
• It is used in industrial process control, jet plan, airplanes.
• These computers are mainly used in hospital to measure the heart beat of patient.
• It can transfer data from analog to digital and digital to analog.

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