Patent ID: 11817780

Abstract:
A power supply circuit with a novel structure is provided. The power supply circuit includes a power converter circuit supplying power to a load; a current sensing circuit generating a first signal including data on a current flowing through the load; a voltage sensing circuit generating a second signal including data on a voltage applied to the load; a correction circuit that includes a digital filter, a digital-analog converter circuit to which a signal output from the digital filter is input, and a sample-and-hold circuit for retaining a signal output from the digital-analog converter circuit and generates a third signal obtained by correcting the second signal; a selection circuit selecting the first signal or the third signal; an output circuit generating an output signal for controlling the power converter circuit in accordance with the signal selected by the selection circuit; and a control signal generation circuit controlling switching between a first operation for generating the output signal in accordance with the first signal and generating the third signal and a second operation for generating the output signal in accordance with the third signal.