Detector low frequency compensation circuit, detector preamplifier circuit and detector circuit

The invention belongs to the field of seismic exploration, and particularly relates to a detector low frequency compensation circuit, a detector preamplifier circuit and a detector circuit. Differentgains at different frequencies are achieved by using an amplifier feedback loop, and different attenuations at different frequencies are achieved by using a compensation circuit independent from the amplifier to respectively achieve the purpose of low frequency compensation, that is, insufficient low frequency information caused by various reasons is compensated, thereby improving the imaging effect and the accuracy of seismic exploration data, and effectively improving the depth of an exploration target layer. 本发明属于本发明涉及地震勘探领域，尤其涉及种检波器低频补偿电路、前置放大电路及其检波器电路。本发明通过利用放大器反馈回路来实现不同频率下的不同增益及利用独立于放大器的补偿电路实现不同频率下的不同衰减来分别达到低频补偿的目的，即对各种原因造成的不足的低频信息进行补偿，从而提高地震勘探资料的成像效果和精度，并有效提升勘探目的层的深度。