电流镜(current mirror)是一种常见且实用的电路功能，对于一些应用非常有用，但可能会要求很高的精度。为了让电流镜具备足够的精度，相关技巧与方法可以说是多不胜数，包括匹配晶体管、使用单芯片多重晶体管、增加发射极退化电阻、采用多颗辅助晶体管的 ...

For applications that require or desire a computer controlled variable current, the use of a digitally controlled potentiometer and a current mirror with degeneration provides a low cost solution. One ...

ON Semiconductor, a premier supplier of high performance silicon solutions for energy efficient electronics, has introduced the CAT2300 current mirror with switch controller, that when combined with ...

If you’re the sort who finds beauty in symmetry – and I’m not talking about your latest PCB layout – then you’ll appreciate this clever take on the long-tailed pair. [Kevin]’s video on this topic ...

An international group of researchers has developed an electronic device that is said to effectively mitigate hotspots in PV modules. It uses two current comparators, two NPN transistors, and a ...

Circuit and system design requirements often mean compromises. For example, optoisolators are used almost everywhere, but they are highfrequency limited. This simple circuit allows for wider bandwidth ...