【摘要】 反馈放大电路和滤波电路在理论分析和实践教学中都比较重要，然而在传统的电路实验教学中，少有将二者结合的任务驱动型电路设计实验。从太赫兹探测器读出电路这一实际的科研任务出发，设计了一种由前置放大、二级放大和有源滤波三个模块级联组成的高增益低噪声放大电路，并完成了仿真分析、参数调整优化和实验验证。这一内容有助于培养学生基于实际需求的电路综合设计、仿真分析和动手实践的能力。更多还原

【Abstract】 The feedback amplification circuit and filter circuit are important in theoretical analysis and experimental education. However, in the traditional course of electric circuit experiment, few task-driven circuit design experiments combining the above two aspects exist. Starting from the practical research program of read-out circuits of terahertz detectors, a high gain and low noise amplifier circuit consisting of three cascaded modules(pre-amplifier, secondary modulation and active filter) is designed. The circuit simulation, parameter optimization and experimental verification are completed. This content helps to cultivate students′ ability of circuit synthesis, analysis, simulation and experiments based on actual demand.更多还原