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一个自激振荡器要建立振荡,必须满足的条件之一便是相位平衡条件:??式中:?为振荡槽路阻抗的相角;?和?分别为折合反馈系数的相角和反馈系数的相角,一般电子管渗透率是很小的,所以?;?为电子管平均跨导的相角.减少振荡器因电源电压变动而影响频率变动的办法之一是,人为地设计一种电路,使其在?的基础上满足(1)式的条件.
One of the conditions that must be satisfied for a free-running oscillator to establish oscillation is the phase equilibrium condition: where: is the phase angle of the tank impedance of the oscillator; and φ are the phase angle and the feedback coefficient of the feedback factor, respectively Of the phase angle, the general tube permeability is very small, so?;? For the average transconductance of the tube phase angle. Oscillator to reduce power supply voltage changes affect the frequency of change is one way to artificially design a circuit, So that it satisfies the condition of (1) based on?