公开(公告)号：US11946956B2

公开(公告)日：2024-04-02

申请号：US17545033

申请日：2021-12-08

Applicant: DENSO CORPORATION

Inventor： Takasuke Itou ,  Tomohiro Nezuka ,  Yasuaki Aoki ,  Yuuta Nakamura ,  Takashi Yoshiya

IPC: G01R19/165 ,  H03F3/04 ,  H03K5/24

CPC classification number: G01R19/165 ,  H03F3/04 ,  H03K5/24

Abstract: A signal detection circuit detects, as a detection target signal, a signal of a main terminal of a switching element by comparing the detection target signal with a reference signal. The signal detection circuit includes: a signal generation unit generating the reference signal; a first capacitor having a first terminal connected with the main terminal of the switching element; a second capacitor having a first terminal connected with an output terminal of the signal generation unit; and a detection circuit receiving, as input signals, a signal output from a second terminal of the first capacitor and a signal output from a second terminal of the second capacitor, and the detection circuit detecting the detection target signal based on the input signals.

公开(公告)号：US11784612B2

公开(公告)日：2023-10-10

申请号：US17545035

申请日：2021-12-08

Applicant: DENSO CORPORATION

Inventor： Takasuke Itou ,  Tomohiro Nezuka ,  Yasuaki Aoki ,  Yuuta Nakamura ,  Takashi Yoshiya

IPC: H03F3/00 ,  H03F3/45 ,  G11C27/02

CPC classification number: H03F3/005 ,  G11C27/024 ,  H03F3/45

Abstract: A signal detection circuit includes: a first capacitor having a first terminal connected with a first main terminal of a switching element; a second capacitor having a first terminal connected with a second main terminal of the switching element; and a detection circuit having a differential circuit configuration. The detection circuit receives, as input signals, a signal from a second terminal of the first capacitor and a signal from a second terminal of the second capacitor, detects detection target signals based on the input signals. The detection target signals include a signal of the first main terminal of the switching element and a signal of the second main terminal of the switching element.