为改善波导栅型薄膜复合探测器件位敏阳极读出光电信号质量，降低栅型薄膜引起的电子束多径展宽对阳极探测信号的影响，研究了微通道板波导栅型复合探测信号在阳极的直接耦合提取方法。根据低能电子束在多元介质中的散射模型，利用蒙特卡洛统计方法对入射到栅型薄膜中的低能电子束轨迹进行模拟，并分析均匀分布和高斯分布下波导栅极引入噪声和透射电子束径向偏移对阳极信号提取精度的影响。对透射过栅型薄膜到达阳极的微弱光电脉冲信号的前置放大和串联压控多级级联放大模式，给出适用于加性高斯分布噪声叠加下基于Sallen-Key拓扑结构的四阶切比雪夫低通滤波和峰值保持电路的专用提取方案，减小波导栅型薄膜对信号信噪比和频响特性的影响。搭建专用波导栅型复合探测位敏信号读出平台，结合系统并行单点接地的连接模式和楔条形阳极位敏电荷直接耦合提取方式，验证器件阳极信号提取方法，获得2 μs脉宽，200 kHz频率的准高斯脉冲提取信号。

In order to improve the photoelectric signal quality from position-sensitive anode of waveguide-gate thin film complex detector and reduce the influence of the multi-path broadening of the electron beams caused by the thin gate film, a direct extraction method of the complex detection signal of the waveguide gate based on micro channel plate was studied. According to the scattering physical model of electron beams with low energy in multimedia materials, the trajectory of incident low-energy electron beams was simulated by Monte Carlo statistical method in the gate film. Further more, accuracy deviation of signal extraction of the anode resulted from noises introduced from the waveguide gate was respectively analyzed under uniform distribution and Gaussian distribution. Accuracy deviation of signal extraction of the anode affected by the radial position shift of transmission electron beams in the process of transmission through the thin gate film was analyzed as well. The preamplification mode and series voltage controlled multi-stage cascade amplification mode were researched for weak photoelectric signal pulses came through the thin gate film to the anode. A fourth order Chebyshev low pass filtering method based on a circuit topology named Sallen-Key was proposed under additive Gauss distribution noise to reduce the influence of waveguide gate film on signal-to-noise ratio and make frequency response characteristics of signal wave form better. A peak sample and hold circuit of multi signal channels was presented as well. A complete and special platform was constructed to achieve the extraction of position sensitive signal from the waveguide-gate complex detection device, combined with parallel single point grounding connection mode of the whole readout system of anode signal and the direct extraction of position sensitive charge on wedge stripe anode. The signal extraction method of the device′s anode was verified in a vacuum chamber. The quasi-Gaussian impulse extraction signal with 2 μs pulse width and 200 kHz frequency was obtained.