This paper tries to discuss the work principle of frequency transformation on the circuit where diodes work on on-off speciality.
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。
2
Multiplier is the circuit which is conformed of nonlinear elements and can make two signal multiplied so that it can implement frequency transformation.
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。
3
A preprocessing circuit is designed for analog signal transformation because of large inner impedance of biosensor and bipolar signal.