US 12,413,222 B2
Detection circuit and power supply control device
Kota Oda, Yokkaichi (JP); and Masaya Ina, Yokkaichi (JP)
Assigned to AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
Appl. No. 18/247,149
Filed by AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Jul. 21, 2021, PCT No. PCT/JP2021/027304
§ 371(c)(1), (2) Date Mar. 29, 2023,
PCT Pub. No. WO2022/070569, PCT Pub. Date Apr. 7, 2022.
Claims priority of application No. 2020-167159 (JP), filed on Oct. 1, 2020.
Prior Publication US 2024/0250679 A1, Jul. 25, 2024
Int. Cl. H03K 17/082 (2006.01); G01R 19/165 (2006.01)
CPC H03K 17/082 (2013.01) [G01R 19/16576 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A detection circuit comprising:
a current output device configured to output a current corresponding to a circuit voltage between an input terminal of a semiconductor switch to which a current is input and ground of a switching circuit that switches the semiconductor switch ON or OFF; and
a circuit resistor through which the current that is output from the current output device flows,
wherein a voltage between two ends of the circuit resistor is output, and
a voltage between the ground of the switching circuit and a downstream end of the circuit resistor is higher than 0 V; and
wherein the current output device includes:
a device resistor to which a current flows from the input terminal of the semiconductor switch; and
a PNP bipolar transistor including an emitter connected to a downstream end of the device resistor,
wherein a potential of a base of the bipolar transistor is a ground potential of the switching circuit, and
a current output from a collector of the bipolar transistor flows to the circuit resistor.