MOSFETs + extras (1)

In this month's instalment and the next we will take a look at MOSFETs with unusual characteristics. Because quite a lot can be said about this subject, we will discuss only one component this time. When I first came across one of these components I realised that even as a professional electronics engineer one is continually learning new things. This encouraged me to share this knowledge with other electronics engineers via this regular monthly column. In this third article of the series we describe the 'current sense MOSFET'; next month we will look at the intelligent 'high-side switch'.