US 11,797,036 B2
Detection and protection circuit, power supply circuit, power supply method of active device
Qian Yang, Guangdong (CN); and Jijie Shi, Guangdong (CN)
Assigned to XI'AN ZHONGXING NEW SOFTWARE CO., LTD., Xi'an (CN)
Appl. No. 17/285,907
Filed by XI'AN ZHONGXING NEW SOFTWARE CO., LTD., Shaanxi (CN)
PCT Filed Nov. 13, 2019, PCT No. PCT/CN2019/117849
§ 371(c)(1), (2) Date Apr. 15, 2021,
PCT Pub. No. WO2020/108297, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 201811463570.9 (CN), filed on Nov. 30, 2018.
Prior Publication US 2021/0373587 A1, Dec. 2, 2021
Int. Cl. G01R 31/40 (2020.01); G05F 1/569 (2006.01); G01R 31/54 (2020.01); G01R 31/66 (2020.01); G01R 31/52 (2020.01); G01R 1/30 (2006.01); G01R 1/36 (2006.01); G01R 31/28 (2006.01); H03K 5/24 (2006.01)
CPC G05F 1/569 (2013.01) [G01R 1/30 (2013.01); G01R 1/36 (2013.01); G01R 31/282 (2013.01); G01R 31/40 (2013.01); G01R 31/52 (2020.01); G01R 31/54 (2020.01); G01R 31/66 (2020.01); H03K 5/24 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A detection and protection circuit of an active device, wherein the detection and protection circuit comprises: a comparator, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, and a second diode,
wherein the first resistor is connected in series to the second resistor, and an end of the second resistor away from the first resistor is grounded; a positive input end of the comparator is connected to the third resistor, a negative input end of the comparator being connected to the fourth resistor, a power supply end of the comparator being connected to a power supply output pin of a power management device, a ground end of the comparator being grounded, an output end of the comparator being connected to a main controller; an end of the third resistor away from the positive input end is connected between the first resistor and the second resistor; an end of the fourth resistor away from the negative input end is connected to the first resistor, and an end of the fourth resistor connected to the first resistor is further connected to a first power supply; the fifth resistor is connected in series to the sixth resistor, an end of the sixth resistor away from the fifth resistor being grounded, an end of the fifth resistor adjacent to the sixth resistor being further connected to the main controller; a negative electrode of the first diode is connected between the fourth resistor and the negative input end, and a positive electrode of the first diode is connected to a power supply circuit; and a positive electrode of the second diode is connected to the negative input end, and a negative electrode of the second diode is connected to a power supply port of the active device.