The invention provides a resistance detection circuit, a dimming circuit and a vehicle. In the resistance detection circuit, the first protection resistor is connected in series with the detection resistor, so that the first protection resistor can also perform voltage division with the divider resistor under the condition that the detection resistor has a short-circuit fault, and the drop amplitude of the output voltage of the resistance detection circuit is reduced under the condition. In addition, the second protection resistor is connected in parallel between the two ends of the series branch formed by the detection resistor and the first protection resistor, so that the second protection resistor and the divider resistor can perform voltage division under the condition that the detection resistor has an open circuit fault, and the drop amplitude of the output voltage of the resistance detection circuit is reduced under the condition. In conclusion, the resistance detection circuit can reduce the decrease amplitude of the self output voltage under the condition that the self detection resistance is abnormal, so that the resistance detection circuit reduces the possibility that the output voltage of the resistance detection circuit is abnormal due to the abnormity of the self detection resistance.
本申请提供一种电阻检测电路、调光电路和车辆。在该电阻检测电路中,由于第一保护电阻与检测电阻串联连接,所以在检测电阻发生短路故障的情况下,第一保护电阻还可以与分压电阻进行分压,从而使得电阻检测电路的输出电压在此情况下的下降幅度减小。另外由于第二保护电阻并联在检测电阻与第一保护电阻形成的串联支路的两端之间,所以在检测电阻发生断路故障的情况下,第二保护电阻还可以与分压电阻进行分压,从而使得电阻检测电路的输出电压在此情况下的下降幅度减小。综上所述,该电阻检测电路可以减小自身输出电压在自身检测电阻异常的情况下的下降幅度,因此该电阻检测电路降低了因自身检测电阻异常而导致电阻检测电路的输出电压异常的可能性。
Resistance detection circuit, dimming circuit and vehicle
一种电阻检测电路、调光电路和车辆
07.01.2025
Patent
Elektronische Ressource
Chinesisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
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