The embodiment of the invention relates to the technical field of vehicle machine detection, in particular to a vehicle-mounted detection circuit and a vehicle machine system. According to the embodiment of the invention, the hysteresis circuit is arranged and is connected between the second enable end and the first output end, and the voltage value of the second enable end can be adjusted, so that the enable control circuit is not conducted before the enable control circuit reaches conduction adjustment; when the enabling control circuit achieves conduction regulation, the switch power supply circuit is conducted, so that the first output end supplies energy to the hysteresis circuit, and the voltage of the second enabling end is increased and is higher than the conduction condition of the enabling control circuit; and deep saturation conduction of the enabling control circuit is realized. Therefore, the stability of the whole circuit is ensured, and the problem of small-amplitude fluctuation of the voltage of the enable output end of the detection chip is effectively avoided.
本发明实施例涉及车机检测技术领域,具体涉及车载检测电路及车机系统。本发明实施例通过设置滞回电路,滞回电路连接在第二使能端与第一输出端之间,可以对第二使能端的电压值进行调节,从而实现在使能控制电路达到导通调节前,使能控制电路不导通;在使能控制电路达到导通调节时,开关供电电路导通从而使第一输出端给滞回电路供能,进而使第二使能端的电压拉高且高于使能控制电路的导通条件;实现使能控制电路深度饱和导通。保证了整个电路的稳定性,有效避免了由于出现检测芯片的使能输出端电压小幅度的波动的问题。
Vehicle-mounted detection circuit and vehicle machine system
车载检测电路及车机系统
2024-10-11
Patent
Electronic Resource
Chinese
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