![]() ![]() Small changes in the voltage level of an analog signal can produce significant errors when being processed.Īnalog signals are commonly used in communication systems that convey voice, data, image, signal, or video information using a continuous signal. It would take a designer who is familiar with analog circuits to design an analog radio receiver, or an analog battery charger, since digital components have been adopted to simplify those designs.Īnalog circuits are usually more susceptible to noise, with “noise” being any small, undesired variations in voltage. In general, analog circuits are more difficult to design than digital circuits that accomplish the same task. Circuits built with a combination of these components are analog circuits (see Figure 3).Īnalog circuits can be complex designs with multiple components, or they can be simple, such as two resistors that form a voltage divider. Most of the fundamental electronic components - resistors, capacitors, inductors, diodes, transistors, and operational amplifiers (op amps) - are all inherently analog components. time graph, digital signals are one of two values, and are usually between 0V and VCC (usually 1.8V, 3.3V, or 5V) (see Figure 2).
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