What is need of regulated power supply?
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A regulated voltage very important for the smooth functioning of many electronic circuits it deliver a constant voltage at its output regardless of changes in ac supply voltage and load current. Without voltage regulator in power supply, it may give unexpected result or damage one of the components in the circuit, hence voltage regulator is needed.
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The major disadvantage of a power supply is that the output voltage changes with the variations in the input voltage or The D.C output voltage of the rectifier also increase similarly, In many electronic applications, it is desired that the output voltage should remain constant regardless of the variations in the input voltage or load. In order to get ensure this; a voltage stabilizing device called voltage regulator is used.
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