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基于充放电原理的小电容测量电路的设计
资料介绍
针对目前电容量小,连接被测电容和测量电路之前的电缆周围存在着较强的寄生电容干扰,微弱电容测量电路采样频率低,现有电容测量电路不能满足被测电容对采样率的要求等问题,提出了一种新型的基于充放电的微弱电容测量电路。该测量电路分析了现有电容测量电路中的关键部件,采用高采样率、高精度、高稳定性的信号调理电路实现传统测量电路中的信号调理电路部分。通过对信号调理电路的改善,达到具有国内外领先水平的高采样率电容测量电路。经过实验验证测量电路的采样率,发现该电容的采样率可达100kHz,满足了目前众多电容对测量电路采样率的需求。
Aiming at the small capacitance,there is interference of stray capacitance and other capacitance between the sensor and the measurement circuit,the transient variation of the measured capacitance requires the measured circuit with high sampling rate,the capacitance measurement circuit can not meet these performance problems,put forward a kind of small capacitance measurement circuit based on charge discharge principle.The measuring circuit analysis the key components of the existing capacitance measurement circuit,high sampling rate,high precision and high stability constant current source charging and discharging signal conditioning circuit to replace the signal with small capacita...
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| 文件名 | 大小 |
| 基于充放电原理的小电容测量电路的设计.pdf | 2M |
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