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本刊第14期登载了“关于‘射极偏置电路’的看法”一文。该文认为对于V_(BE)的变动而言,固定偏流电路的静态工作点比射极偏置电路更稳定。我认为单单抽出V_(BE)的变化来讨论问题,是片面的。因为随着温度的上升,管子的I_(CBO)、、β、V_(BE)都要发生相应的变动,变动的结果都集中表现在静态工作点电流I_(CQ)的变化上。射极偏置电路之所以比固定偏流电路有更好的温度稳定性,正是在于电路的结构使得I_(CQ)几乎不受I_(CBO)、V_(BE)、三者的影响(证明从略),而I_(CBO)、V_(BE)、却都是同时随温度变化而变动,并导致I_(CQ)变化的诸因素。
Article No. 14 published “on the emitter bias circuit ’view” one article. This paper argues that for V_ (BE) variations, the static operating point of the fixed bias current circuit is more stable than the emitter bias circuit. I think it is one-sided to discuss the issue simply by looking at the changes in V_ (BE). Because as the temperature rises, the I_ (CBO) ,, β, V_ (BE) of the pipe should all change correspondingly, the result of the change concentrates on the change of the static operating point current I_ (CQ). The reason why the emitter bias circuit has a better temperature stability than the fixed bias current circuit is that the structure of the circuit makes the I_ (CQ) hardly affected by CB_ (CBO), VB_ (BE) However, I_ (CBO) and V_ (BE) are all the factors that change with the temperature at the same time and lead to the change of I_ (CQ).