US 11,946,956 B2
Signal detection circuit
Takasuke Itou, Kariya (JP); Tomohiro Nezuka, Kariya (JP); Yasuaki Aoki, Kariya (JP); Yuuta Nakamura, Kariya (JP); and Takashi Yoshiya, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Dec. 8, 2021, as Appl. No. 17/545,033.
Application 17/545,033 is a continuation of application No. PCT/JP2020/023034, filed on Jun. 11, 2020.
Claims priority of application No. 2019-111975 (JP), filed on Jun. 17, 2019.
Prior Publication US 2022/0091162 A1, Mar. 24, 2022
Int. Cl. G01R 19/165 (2006.01); H03F 3/04 (2006.01); H03K 5/24 (2006.01)
CPC G01R 19/165 (2013.01) [H03F 3/04 (2013.01); H03K 5/24 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A signal detection circuit that 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 comprising:
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.