Analysis and Design of Source Circuit with LM317T

The working course and the voltage output formula of a kind of positive voltage regulator with LM317T are introduced.Detailed analysis and design of the circuit are provided.The main parameters′ value and experiment waveforms of the circuit are presented.At last this circuit is made into printed circuit board and several important test points′ voltage are tested.The circuit is simulated by software Protel and the results are accorded with the actual test value.All these improve that this kind of circuit with LM317T is reliable and has practical application value.