US 12,140,984 B2
Power supply circuit and transmitting device
Hironobu Konishi, Kanagawa (JP); and Toshio Suzuki, Kanagawa (JP)
Assigned to SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
Appl. No. 17/281,397
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Aug. 6, 2019, PCT No. PCT/JP2019/030810
§ 371(c)(1), (2) Date Mar. 30, 2021,
PCT Pub. No. WO2020/075376, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 2018-191759 (JP), filed on Oct. 10, 2018.
Prior Publication US 2022/0043472 A1, Feb. 10, 2022
Int. Cl. G05F 1/10 (2006.01); G05F 1/575 (2006.01)
CPC G05F 1/575 (2013.01) 12 Claims
OG exemplary drawing
 
1. A power supply circuit, comprising:
a current feedback unit, wherein the current feedback unit includes:
two p-type MOS transistors;
a control element; and
a first resistor, wherein
the two p-type MOS transistors and the control element configure a current turnback circuit that is configured to turn back current,
a current that flows through the control element and a current that flows through the first resistor are substantially the same as a reference current in a circuit, and
output voltage is determined at least based on the first resistor and the reference current.