⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种基于无源开关电容的多模式放大器，能够在-25至200°C的宽温度范围内实现0.75%的对数一致性误差，解决了高温环境下声学传感器前端需要宽动态范围和精确相位/幅度测量的难题。
requires integrated electronics to endure harsh environments with temperatures up to 200°C. Acoustic sensors (e.g., piezoelectric) detect environmental composition, as illustrated in Fig. 3.3.1 (top). Due to the natural wide amplitude range of sound pressure waves (1-to-20kHz), the amplifiers in the sensor front-end need both a wide dynamic range (DR) > 80dB to maintain a reasonable signal-to-noise ratio (SNR) at the ADC input, as well as accurate phase and amplitude measurement across a wide temperature range. While logarithmic amplifiers [1,2], dB-linear amplifiers [3], or automatic gain control (AGC) [4] achieve a high DR, they require post-processing to restore true amplitude levels. Furthermore, logarithmic amplifiers exhibit considerable temperature dependence. Low-drift amplifiers [5] with a typical gain
Hendrik Siemssen1, Rochus Nowosielski2, Holger Borchardt2, Jan Mueller2, Bernhard Wicht1
Leibniz University Hannover, Hannover, Germany Baker Hughes, Celle, Germany 1 2 Harnessing new renewable energy sources, such as geothermal energy,