本文在对相位噪声的概念、产生及其相关测量方法研究的基础上，设计出一种低噪声频率变换电路。
This paper presents a new type of low noise frequency conversion circuit based on the research of phase noise conception, generation as well as relativity measurement method.
相乘器是由非线性元件组成，可以实现两个信号的相乘，完成频率变换的电路。
Multiplier is the circuit which is conformed of nonlinear elements and can make two signal multiplied so that it can implement frequency transformation.
该文系统地讨论二极管工作在开关特性下所组成电路的频率变换的工作原理。
This paper tries to discuss the work principle of frequency transformation on the circuit where diodes work on on-off speciality.
大功率直接变频电路的基本功能是实现频率和电压的直接变换，被应用于航空电源和调速电源中。
The large power AC-AC frequency-changers are used in the aircraft power source and AC speed-regulation systems to convert frequency and voltage directly.
分析了模拟电压一频率比变换电路原理，给出了元件参数的设计要求及其计算方法。
After the analyses of circuit theory of analogue voltage-to-frequency ratio converter, the design requirement of component parameters and the calculation method are presented.
该电路作放大和分频时，工作稳定、同步范围宽，频率变换增益高。
Utilized as an amplifier or divider, it has good stability, wide synchronous range and high translation gain.
该电路作放大和分频时，工作稳定、同步范围宽，频率变换增益高。
Utilized as an amplifier or divider, it has good stability, wide synchronous range and high translation gain.
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