A study of the reset transient of charge-sensitive amplifiers operating with a pulsed switch in parallel to the feedback capacitance is presented. Analytical models have been developed for amplifiers in both linear and slew rate regimes during the reset phase. The models predict the time interval required to reset the amplifier that, in most cases, significantly differs by the simple discharge of the feedback capacitance through the switch resistance and strongly depends on the open-loop gain and bandwidth of the core amplifier and on the input capacitance. The models also quantitatively predict spurious voltage transients at the preamplifier's input and possible ringings at the output, as a function of the main general parameters of the circuit. A case application study of the presented model is proposed for low-capacitance detectors, such as semiconductor drift detectors or small pixel detectors.

中文翻译：

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脉冲复位电荷敏感放大器中放电瞬态的分析模型


研究了与反馈电容并联的脉冲开关操作的电荷敏感放大器的复位瞬态。已经为复位阶段线性和转换速率状态下的放大器开发了分析模型。这些模型预测了重置放大器所需的时间间隔，在大多数情况下，该时间间隔与通过开关电阻进行反馈电容的简单放电有很大不同，并且很大程度上取决于核心放大器的开环增益和带宽以及输入电容。该模型还定量预测前置放大器输入端的杂散电压瞬变以及输出端可能出现的振铃，作为电路主要一般参数的函数。提出了针对低电容探测器（例如半导体漂移探测器或小像素探测器）的所提出模型的案例应用研究。