Rohm Co., Ltd.

Yohei Moriyama

Atsushi Yamaguchi

Junichi Kashiwagi

Ken Nakahara

Yusuke Nakakohara

Yuta Okawauchi

Koki Sakamoto

A semiconductor rectifier includes a transistor and a diode. The transistor includes a source electrode, a drain electrode and a gate electrode. The diode includes an anode electrode and a cathode electrode. The anode electrode is electrically connected to the gate electrode, and the cathode electrode is electrically connected to the source electrode.

Semiconductor rectifier

A ripple injection circuit equipped with: a capacitor that passes a frequency component of an input voltage or a frequency component of an output voltage and that generates a first ripple voltage having a first ripple component; and an integration circuit that integrates a comparison result signal and that generates a second ripple voltage having a second ripple component. The first ripple component and the second ripple component are added to a feedback voltage.

Ripple injection circuit and electronic device equipped with this circuit

A switching power supply circuit includes: a voltage generation circuit that generates an output voltage by smoothing, with a capacitor, a voltage produced in an inductor; an integration circuit that integrates a switching voltage to generate a first ripple voltage including a first ripple component; a feedback voltage generation circuit that divides the output voltage to generate a feedback voltage; a comparison circuit that compares the feedback voltage with a reference voltage to output the result of the comparison as a comparison result signal; an integration circuit that integrates the comparison result signal to generate a second ripple voltage including a second ripple component; and a drive circuit that controls the turning on and off of a switch element based on the comparison result signal, where the first ripple component and the second ripple component are added to the feedback voltage.

Growing community of inventors

Kyoto, Japan

Yohei Moriyama