To enhance the stability of the circuit,an accelerometer data collection circuit was designed on the basis of the principle of charge balance in integral I/F switching circuit. The dynamic auto-stabilized operational amplifier ICL7650,which can revise the zero offset of the circuit,was used. The specific realization of each function module of the circuit was introduced with detailed analysis of the device type selection and its parameter determination. Then the importance and the implementation of constant current source were described in detail. It is proved through test that the circuit performance is of high stability, reliability and nonlinearity and it can be widely used in fields of data-acquisition, communication systems and industries.%为提高电路的稳定性,根据电流积分型I/F转换电路的电荷平衡原理,设计了一个基于动态自动校零运放ICL7650的加速度计采集电路.由于该运放的自动校零功能,使电路本身能够对零位和漂移进行自校正.介绍了采集电路的各个功能模块具体实现方案,对各器件的选型和参数确定做出详细的分析.着重介绍了恒流源的重要性和实现方法.经测试证明,电路性能稳定可靠,具有良好的非线性度,可以广泛应用于其他数据采集和通讯系统、工业等领域.
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