Patent ID: 9665114
Date: 2017-05-30
CPC Classifications: G05F

Claim:
1. A regulator, comprising: a sensing circuit, arranged to sense a variation of a first reference voltage on an output terminal to generate a sensing signal; and a gain stage, arranged to adjust an adjusting current to the output terminal in response to the sensing signal for reducing the variation of the first reference voltage to regulate the first reference voltage on the output terminal, and the gain stage is coupled in parallel to a loading circuit powered by the first reference voltage; wherein when the sensing circuit senses a decrease of the first reference voltage, the sensing signal adjusts the adjusting current via the gain stage coupled in parallel to the loading circuit to increase the first reference voltage on the output terminal, and when the sensing circuit senses an increase of the first reference voltage, the sensing signal adjusts the adjusting current via the gain stage coupled in parallel to the loading circuit to decrease the first reference voltage on the output terminal; wherein the sensing circuit comprises: wherein the drain terminal of the diode-connected transistor is coupled to the gate terminal of the diode-connected transistor, and the sensing signal is generated at the gate terminal of the diode-connected transistor.