积分增益是积分电路的一个重要参数。积分增益愈大,积分运算精度愈高。积分增益降低则使积分误差变大。积分增益很低时,将会使积分器难以积分。本文导出了准确而又实用的积分增益计算式。根据积分增益的计算值,可以求得积分运算的时域误差和频域误差,并确定积分器的工作频段。这些公式为积分电路的定性和定量分析提供了一种简捷有效的途径。 Integral gain is an integral parameter of the circuit. The greater the integral gain, the higher the precision of integral operation. Decreasing the integral gain increases the integral error. When the integral gain is low, it will be difficult for the integrator to integrate. This article derived an accurate and practical integral gain calculation formula. According to the calculated value of the integral gain, the time domain error and the frequency domain error of the integral operation can be obtained, and the operating frequency band of the integrator can be determined. These formulas provide a simple and effective way for the qualitative and quantitative analysis of integral circuits.