| 摘要 |
Disclosed is a low dropout voltage regulator which has frequency selectivity according to the variation of an output signal. A feedback voltage is inputted and compared with a reference voltage to be amplified in a path, where two error amps are arranged. The error amps are arranged in parallel and have different gains and band widths. The gain of a first error amp is smaller than the gain of a second amp and has a wide band width. Therefore, the first error amp quickly responds to the high frequency component of an output signal and actively amplifies the component. In addition, the second amp can perform a quick regulation operation of the output signal with a high gain for the low frequency component of the output signal. [Reference numerals] (200) Reference voltage generator; (230) Path element; (250) Load |
