在中功率计量标准中,常采用信号稳幅器以减小失配误差.介绍了一种用于中功率稳幅系统的新型稳幅器,给出了稳幅器的组成和电路原理图,对稳幅器各部分电路的功能进行了分析.测试结果表明,该稳幅器具有较好的稳幅和控制性能,目前已得到很好的应用.“,”The signal amplitude stabilizer is usually applied in the mid-power standard to decrease the mismatch error.A new amplitude stabilizer used in mid-power standard is presented in this paper.The configuration and the circuit diagram are introduced firstly,and then every function module of the amplitude stabilizer also gets detailed analysis.The measurement results show the validity for the amplitude stabilizer presented above.Now this new kind of amplitude stabilizer has achieved good application in mid-power measurement.