| 摘要 |
The present invention discloses a startup circuit. The startup circuit is utilized for activating a bandgap voltage generator, wherein the bandgap voltage generator includes a first terminal for providing a first voltage level and a second terminal for providing a second voltage level. The startup circuit includes a switching circuit, an activating circuit, and a controlling circuit. The switching circuit is coupled to the bandgap voltage generator; the activating circuit is coupled to the switching circuit for conducting the switching circuit to activate the bandgap voltage generator; and the controlling circuit is coupled to the switching circuit for monitoring the variation of the first voltage level and the second voltage level to control the conductivity of the switching circuit. |
