Ultra-low drift quasi-static charge amplifier

The utility model discloses an ultra-low drift quasi-static charge amplifier. Relates to improvement of quasi-static charge amplifiers. Comprising a first quasi-static charge amplifier and a second quasi-static charge amplifier, and the first quasi-static charge amplifier and the second quasi-static charge amplifier are respectively connected with an output push-pull circuit. The double quasi-static charge amplifiers are adopted, one quasi-static charge amplifier is used for charge measurement, the other quasi-static charge amplifier is used for generating drift voltage Vb, the output voltage drift rate is reduced by one order of magnitude, the measurement precision is improved, and therefore calibration of the sensitivity of a small-range force and pressure sensor becomes possible. 超低漂移的准静态电荷放大器。涉及准静态电荷放大器的改进。包括第一准静态电荷放大器和第二准静态电荷放大器，所述第一准静态电荷放大器和所述准静态电荷放大器分别连接输出推挽电路。采用双准静态电荷放大器，一个准静态电荷放大器用于电荷测量，另一个准静态电荷放大器用于产生漂移电压Vb，输出电压漂移速率降低了一个数量级，提高了测量精度，从而使标定小量程力、压力传感器灵敏度成为可能。