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digital networks

A) In many cases, the signal is initially in the form of an analogue electrical voltage or current, produced for example by a microphone or some other type of transducer. In some situations the data is already in digital form - such as the output from the readout system of a CD (compact disc) player. An analogue signal must be converted into digital (i.e. numerical) An analogue electrical voltage signal, for example, can be digitised using an integrated electronic circuit (IC) device called an analogue-to-digital converter or ADC. This generates a digital output in the form of a binary number whose value represents the electrical voltage input to the device. Digital Signals Digital signals are the language of modern day computers. Digit

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