Patent ID: 8068356
Filing Date: 2011-11-29
Classification: H02M

Abstract:
1. A voltage boost circuit comprising: a driver having an input receiving a first input signal and an output; at least one capacitor with a first terminal connected to an output of the voltage boost circuit; a first controllable switch connected between a second terminal of the capacitor and the output of the driver, the second terminal being different from the first terminal; a second controllable switch connected between the second terminal of the capacitor and a ground, wherein the second controllable switch is turned on or off by a second input signal for selectively providing a discharging path for the capacitor; and a voltage level detector coupled between the first terminal and the ground for detecting an output voltage at the output of the voltage boost circuit and providing a control signal to the first controllable switch, the second input signal being different from the control signal, and wherein when the output voltage exceeds a predetermined level, the first controllable switch is turned off, and when the output voltage is lower than the predetermined level, the first controllable switch is turned on.