我用LM334做了个零温度系数的恒流源,附件是电路图,我输入的是5V的电压,二极管用的是IN4148,我R1用33欧,R2用330欧(实际测得325欧),想得到4mA的恒流源,但是现在只有1mA,根据文档上R1应该是667mV,现实际测得只有8.8mV。不知哪里有问题。
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Hi
注意你采用了不同的二极管,它的温漂不一定再是−2.5 mV/°C. (你需要确认这个参数,重新计算)
这样2个电阻对应的关系不一定是10倍。