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Constant current circuit with small output current fluctuation
Constant current circuit with small output current fluctuation
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机译:输出电流变动小的恒流电路
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摘要
A constant current circuit whose output current is less dependent on a current gain of a transistor or an Early voltage thereof is provided. The constant current circuit includes a differential circuit between transistors forming a constant current generating unit and a current mirror circuit. This differential circuit operates as a feedback circuit and the mirror coefficient of the current mirror circuit becomes hardly affected by the current gain or the Early voltage.
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