图示为 R、C 元件组成的低频直角脉冲发生器。图中场效应管 T_1(103)和晶体三极管 T_2(312)构成两级放大器。在正反馈回路中接的 RC 滤波器,其脉冲周期依它的参数而定。应用场效应管的目的是想得到较大的脉冲周期 T_0,如55、307、612、960秒等,相应地所配之电容 C~*型号为 K53-1型,其容量是不大的,如1.0、4.7、7.8、16.5μ等。这种线路按供电电压变化11%来试验,在周期 T_0=612秒时要变化1.5%。而频率重复的不稳定性,在 The figure shows the R, C components composed of low-frequency rectangular pulse generator. FET T_1 (103) and transistor T_2 (312) constitute a two-stage amplifier. In the positive feedback loop connected to the RC filter, the pulse period according to its parameters. The purpose of the application of FET is to get a larger pulse period T_0, such as 55,307,612,960 seconds, etc., the corresponding capacitance C ~ * model for the K53-1 type, its capacity is not large, such as 4.7, 7.8, 16.5μ and the like. The line is tested at 11% change in supply voltage and varies by 1.5% at cycle T_0 = 612 seconds. The frequency of repetitive instability, at