非线性偏置条件下隧道二极管中的触发振荡

本文提出了一类在非线性偏置条件下,由N-型负阻器件构成的具有三个奇点(其中有两个奇点在负阻区)的触发振荡电路。借助于点变换方法研究了该电路的工作特性。分析表明,所提出的电路具有足够宽的触发振荡工作区。用隧道二极管进行了实验,实验结果与理论有较好的符合。

TRIGGERED OSCILLATION IN TUNNEL DIODE CIRCUITS WITH NON-LINEAR BIAS

In some switching circuits employing tunnel diodes, it is found that a stationary relaxation oscillation may be obtained by triggering methods. Triggered quasi-sinusoidal oscillations have been discussed by some authors for the development of digital computers, but the region of biasing currents in which the triggered oscillations occur is not wide enough for practical case.The purpose of this paper is to solve the above mentioned problem: a triggered oscillation circuit utilizing tunnel diodes which is biased non-linearly is proposed. The working properties of such a tunnel diode circuit have been investigated by point transformation and graphical methods. It is found that the operating region in which bistable states exist is wide enough. A simple expression for the normalized minimum biasing current θ_min of bistable operation in obtained; θ_min=(F(μ)-U_F)/(F(μ)-1)≈1-2(U_F-1)μ. The experimental results are in accord with the theoretical analyses. Some more complex circuits for triggered oscillation are also suggested.