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杭州大学已成功地研制出一种新型的半导体三端恒流器件——3DH01—05型可调恒流管。该管经近两年来的试验和改进,已可供实用。其主要性能:最高工作电压为30～70V;最低工作电压为7～8V;输出电流为5～500mA,改变它的控制电阻可实现输出电流的分挡连续可调;动态电阻为20～200kΩ;电流温度系数一般低于0.1％℃~(-1)。 该管可用作恒流源,在数十和数百毫安范围内可代替一般使用的串联调整型稳定电路,还可在仪器桥路中直接实现恒流;用于基准电压,把它与2DW7C串联,对标准稳压管恒流供电,可显著提高基准电压
Hangzhou University has successfully developed a new type of semiconductor three-terminal constant current devices - 3DH01-05-type adjustable constant current tube. The tube after nearly two years of testing and improvement, has become available. The main performance: the maximum operating voltage of 30 ~ 70V; minimum operating voltage of 7 ~ 8V; output current of 5 ~ 500mA, change its control resistor can be continuously adjustable output current divider; dynamic resistance of 20 ~ 200kΩ; Current temperature coefficient is generally lower than 0.1% ℃ -1. The tube can be used as a constant current source in the range of tens and hundreds of milliamperes to replace the commonly used series regulation of stable circuit, but also in the instrument bridge directly to achieve constant current; for the reference voltage, it and 2DW7C series, constant current regulator of the standard power supply, can significantly increase the reference voltage