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本文考虑了两种常用的基本晶体管间歇振荡器电路:1.采用集-基变压器耦合的共射电路;2.采用集-射变压器耦合的共基电路。讨论中假定间歇振荡器的脉冲宽度主要决定于晶体管及线路参数而不是决定于外加的定时器件即延迟线。另外还假定在线路中所用的变压器工作在线性状态,并且不呈现饱和效应。本文概达了间歇振荡器的基本工作原理及其简化的等效电路。并根据线路参数给出了共基间歇振荡器的上升时间的方程式。在方程式中表明负载能引起上升时间变坏。对每种电路都给出了适于设计用的脉宽方程式。一个线性最坏情况的分析表示共基电路对于阶跃电压触发的响应。由于在通导期间晶体管固有的非线性特性,所以这种线性触发分析是近似的,但是最坏情况的分析的结果可用来和实验的上升时间比较。一个幅度足够和脉冲宽度为0.05微秒的触发脉冲足以用来当作阶跃函数电压,因为电路在这样的时间间隔里完全可以获得再生式的动作。文中着重讨论了电路的脉宽稳定性,并指出共基电路的宽度较共射电路稳定。脉宽稳定性的方程式是通过对脉宽方程的偏导数计算得到的。
This article considers two commonly used basic transistor intermittent oscillator circuits: 1. A common-emitter circuit using a set-base transformer coupling; 2. A common-base circuit using a set-to-shoot transformer coupling. In the discussion, it is assumed that the pulse width of the intermittent oscillator depends mainly on the transistor and line parameters and not on the timing of the added delay device. It is also assumed that the transformers used in the line operate in a linear state and do not exhibit saturation effects. This article summarizes the basic working principle of intermittent oscillators and its simplified equivalent circuit. According to the line parameters, the equation of rise time of the common base intermittent oscillator is given. It is shown in the equation that the load can cause the rise time to deteriorate. For each circuit are given suitable for the design of pulse width equations. A linear worst-case analysis shows the response of the common-base circuit to the step voltage trigger. This linear trigger analysis is approximate due to the transistor’s inherent non-linearity during conduction, but the worst case analysis results can be used to compare with the experimental rise time. A trigger pulse of sufficient amplitude and pulse width of 0.05 microseconds is sufficient to be used as a step-function voltage because the circuit is fully regenerative at such time intervals. This paper focuses on the stability of the pulse width of the circuit and points out that the width of the common-base circuit is more stable than the common-emitter circuit. The equation for pulse width stability is calculated from the partial derivative of the pulse width equation.