The circuit structure and the experimental performance of a newly integrated multichannel charge-sensitive preamplifier for silicon or germanium detectors are shown. The circuit has been conceived and optimized for the silicon detector GAL-TRACE, employed for light and heavy ion spectroscopy in nuclear physics experiments. The chip includes four channels optimized for anodic signals and one channel specifically designed for cathodic signals. An I2C interface is used to adjust, as needed, a host of key parameters of the preamplifier, such as sensitivity and bandwidth. An integrated range booster yields an exceptional dynamic range of 103 dB for the cathodic channel. The circuit features a low power consumption of 11 mW per channel, a fast rise time of the order of 10 ns, and low noise. Thanks to an accurate design of the input stage, the equivalent noise charge, measured with a commercial shaping amplifier, is as low as 130 rms electrons at a shaping time of 6 $\mu \text{s}$ with 5 pF of detector capacitance. The bandwidth of the preampifier is adequate for pulse shape analysis techniques used for particle discrimination.

中文翻译：

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用于具有创新光谱范围增强器的固态探测器的集成多通道电荷放大器的设计和实验验证

展示了一种新集成的用于硅或锗探测器的多通道电荷敏感前置放大器的电路结构和实验性能。该电路是为硅探测器 GAL-TRACE 设计和优化的，用于核物理实验中的轻离子和重离子光谱。该芯片包括四个针对阳极信号优化的通道和一个专门针对阴极信号设计的通道。I2C 接口用于根据需要调整前置放大器的许多关键参数，例如灵敏度和带宽。集成的范围增强器可为阴极通道提供 103 dB 的卓越动态范围。该电路具有每通道 11 mW 的低功耗、10 ns 数量级的快速上升时间和低噪声。由于输入级的精确设计，使用商用整形放大器测量的等效噪声电荷低至 130 rms 电子，整形时间为 6 $\mu \text{s}$，检测器电容为 5 pF。前置放大器的带宽足以用于粒子鉴别的脉冲形状分析技术。