Patent ID: 8754628
Filing Date: 2014-06-17
Classification: G05F

Abstract:
1. A voltage regulator comprising: an output transistor connected between a power supply and an output connected to a capacitor; a voltage detector connected between the output and a ground, the voltage detector being configured to divide an output voltage into a first voltage and a second voltage according to a switching signal, the output voltage being a voltage between the output and the ground, the second voltage having a polarity the same as a polarity of the first voltage and having an absolute value lower than or equal to an absolute value of the first voltage; a controller configured to detect a difference between the first voltage and a reference voltage to be a reference of the output voltage generated at the output and control the output transistor so as to reduce the difference; and a discharge circuit connected between the output and the ground, the discharge circuit configured to discharge electric charges of the capacitor from the output to the ground when the absolute value of the second voltage after a change of the switching signal is higher than an absolute value of the reference voltage.