Performance Comparison and Application Strategy for Different Types of FETs: Selecting the Right FET for RF, Power, and Digital Circuits
Field Effect Transistors (FETs) are essential active components in modern electronics. However, not all FETs are the same—each type comes with its own characteristics and use cases. In this post, we compare major FET types—JFET, MOSFET, LDMOS, GaN FET, MESFET, and HEMT—and offer a practical guide to choosing the optimal FET based on your circuit’s purpose and frequency range. 1. Key FET Types and Their Characteristics JFET (Junction FET): High input impedance, low noise, ideal for analog amplification MOSFET: Most widely used general-purpose FET; excellent for digital and power circuits LDMOS: Preferred in high-power RF transmission; excellent linearity and voltage handling GaN FET: Suited for high-frequency, high-power applications; offers fast switching and efficiency MESFET: Used in high-speed microwave applications HEMT: Offers high electron mobility; suitable for satellites, 5G, and radar systems 2....