Extremely low‐noise amplifier for interfacing active devices to instruments for spectral analysis
Extremely low‐noise amplifier for interfacing active devices to instruments for spectral analysis
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DOI：
10.1063/1.1145176
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发表时间：
1994-12
影响因子：
1.6
通讯作者：
P. Manfredi;V. Speziali;F. Svelto
中科院分区：
文献类型：
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作者：
P. Manfredi;V. Speziali;F. Svelto
为了用目前可用的仪器进行非常精确的噪声频谱分析，已经开发了一个模拟接口。它使用被测器件作为前端元件，其输入参考噪声电压由一个反馈环路放大，反馈环路添加极小的噪声贡献，然后是两个级联的低噪声放大器。该接口适用于100 MHz-100 kHz频率范围内的频谱分析。其本征噪声贡献估计在100兆赫兹时约为1nV/√赫兹，在频率超过1千赫兹时约为50pV/√赫兹。
An analog interface has been developed in order to perform very accurate noise spectral analysis with currently available instrumentation. It employs the device under test as a front‐end element, whose input‐referred noise voltage is amplified by a feedback loop which adds an extremely small noise contribution, followed by two cascaded low‐noise amplifiers. The interface is suitable for spectral analysis in the 100 mHz–100 kHz frequency range. Its intrinsic noise contribution is estimated around 1 nV/√Hz at 100 mHz and 50 pV/√Hz at frequencies beyond 1 kHz.