Current expansion circuit composed of μA741

Published:2011/8/4 21:25:00 Author:Rebekka | Keyword: Current expansion | From:SeekIC

Usually the output current of the op amp is about 10 ~ 30mA. For the operation amplifier circuit is composed of the μA741, When the output current is greater than 10 ~ 35mA, its output voltage will appear limiting phenomenon, that means the output voltage will be a greater distortion. When you need a higher output current, you can use the geminate transistor formed by the 2SC503 and 2SA503. The so-called geminate transistor means that its input and output characteristics are almost identical to the transistor. When you use it, it should be strictly selected. It can not be used randomly assigned. The circuit output current can be up to 120mA, the magnification times of the voltage is show as above. μA741 Electrical Characteristics table (VD = ± 15V; TA = 25 ℃).



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