Fingerprint scanners are an essential feature in the smartphone market. Here's how they work and what you need to know about them.

Recent advances have seen significant improvements in readout circuits and conversion techniques, which translate minute changes in capacitance into robust digital signals.

If you ever work with a circuit that controls a decent amount of current, you will often encounter a FET – a Field-Effect Transistor. Whether you want to control a couple of powerful LEDs, sw… ...