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Linear Regulator

Linear regulators are simple voltage regulator circuits commonly used in electronics. This paper briefly discusses how linear regulators work, their advantages and disadvantages, variations on the linear regulator, and important datasheet parameters. Linear regulators uses a closed feedback loop to bias a pass element to maintain a constant voltage across its output terminals. In figure 1, the op-amp drives the base of Q1 to ensure that the voltage at its inverting input will be equal to the voltage reference at its non-inverting input. The A in this circuit has a small load, the base current, and minimal capacitive loading. Consequently, it can respond to changes in load very quickly