| 摘要 |
Disclosed is a stabilized voltage power supply comprising an A/D converting circuit configured to convert an alternate current voltage received from an external power supply to an initial direct current voltage; a PWM signal output unit configured to generate and output a PWM signal; a control switch configured to alternatively carry out, based on control of the received PWM signal, switching between a turn-on state and a turn-off state so as to convert the initial direct current voltage to a pulse voltage whose duty ratio is the same with that of the PWM signal; a final converting circuit configured to convert the pulse voltage to a final direct current voltage, and output the final direct current voltage to an external load via an output terminal; and a feed unit configured to feed the final direct current voltage back to the PWM signal output unit.
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