Instantaneous large current peak detection circuit with rapid gain adjustment

The embodiment of the invention discloses an instantaneous large current peak detection circuit with a rapid gain adjustment function. An analog signal of an impact current is acquired through an analog signal acquisition module; a signal peak value detection module obtains a signal peak value of the analog signal; and the automatic gain adjustment module obtains the signal amplification factor according to the signal peak value and amplifies the analog signal to obtain the amplified analog signal, so that the corresponding amplification factor can be quickly selected, the amplification factor selection through MCU control is not needed, and the accuracy of the amplification factor selection is improved. Therefore, the lightning impulse and the short-circuit current impulse can be sampled by adopting one set of sampling circuit, and the design complexity and the design cost are reduced. 本申请实施例公开了一种具有快速增益调节的瞬时大电流峰值检测电路，通过模拟信号获取模块获取冲击电流的模拟信号；信号峰值检测模块获取所述模拟信号的信号峰值；自动增益调节模块根据所述信号峰值获取信号放大倍数并对所述模拟信号进行放大，获得放大后的模拟信号，