Patent ID: 8981747
Filing Date: 2015-03-17
Classification: G05F

Abstract:
1. A regulator comprising: a differential circuit configured to generate a comparison signal based on a voltage difference between a reference voltage to be applied thereto and a voltage correlated to an output voltage of the regulator; a first current source that supplies current to the differential circuit; a first transistor that adjusts the output voltage based on a voltage corresponding to the comparison signal; a first current mirror circuit connected with a pair of differential output lines of the differential circuit, the differential output lines including a first line that is connected to a gate of the first transistor and a second line; a second transistor that amplifies a high frequency signal superposed on the output voltage and feeds the high frequency signal to the second line of the differential circuit; a second current source that supplies the current for amplifying the high frequency signal in the second transistor; and a first capacitor, which accumulates charge therein as a result of the high frequency signal and controls the current flowing to the second line of the differential circuit via the second transistor in accordance with the accumulated charge quantity.