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对ICL7135A／D转换电路与8031单片机接口电路的设计进行了探讨，并研究了减小双积分A／D转换电路的非线性误差及该电路的抗干扰问题。
The design of ICL7135A / D conversion circuit and 8031 singlechip interface circuit is discussed, and the nonlinear error of double integral A / D conversion circuit and the anti-interference of the circuit are studied.