根据非线性电抗变频电路中,各频率分量的不同作用,设计了一个新型的四频率参量下变频器。对这种参量下变频器作了小信号分析,导出了变频器的增益条件,稳定工作条件及谐振条件。四频率参量下变频器可以稳定地、有增益地下变频工作。谐振条件给出了实现这种新型参量下变频器对网络参数及非线性元件的要求。 According to the different roles of the frequency components in the nonlinear reactance frequency conversion circuit, a new type of four-frequency parametric downconverter is designed. A small signal analysis was made on the inverter under this kind of parameters, and the gain condition, the stable working condition and the resonance condition of the inverter were derived. Four frequency parameters down converter can be stable, there is gain underground frequency conversion work. Resonance conditions are given to achieve the new parameters of the inverter under the network parameters and nonlinear components.