A MOSFET enjoys a wide range of applications in the electronic industry and it is now the most common transistor in commercial ICs. In terms of performance, it has high-speed capability, extremely high input resistance, and relatively constant input capacitance. It is inexpensive to produce and relatively easy to get high yield. It occupies a small area and has low power consumption. These features enable MOSFETs to be used in both high-performance circuits and high-density circuits. Examples of high-performance circuits are the laser driver and multiplexer. For high-density circuits, MOSFETs are almost exclusively used for SRAMs and DRAMs. MOSFETs are also used in conjunction with bipolar transistors, which have higher current drive capability, in BiCMOS (bipolar-CMOS) circuits. MOSFET is also used for specialized device applications. Examples are nonvolatile memories, chemical sensors and bucket brigade devices.
The popularity of the MOSFET as a power device has been increasing. Compared to the bipolar transistor, it is more reliable and more robust, and has better temperature stability. It also has better switching speed due to the absence of storage time, and higher gain at high current levels. Specific examples are switching power supplies, radio-frequency generators, and motor drivers.
