Device Review — Lesson 1

This lesson covers the fundamentals of CMOS RF integrated circuits, focusing on the MOSFET component. It explains why MOSFETs are the most favored components in integrated circuits due to their cost-effectiveness and wide availability. The lesson also discusses the structure and operation of MOSFETs, including the formation of a channel and the impact of voltage on the current. It further delves into the small signal model of the MOSFET and the various capacitances that can occur in the circuit. For instance, the lesson illustrates how the gate to source capacitance is typically larger than the gate to drain capacitance.

Video Highlights

00:25 - Introduction to MOSFET
22:06 - Formation of the channel in mosfet and its importance
36:38 - Small signal model of mosfet and the incorporation of capacitances in the model
52:36 - Gate to source and gate to drain capacitance in mosfet
57:11 - Overlap capacitance in mosfet and its impact

Key Takeaways

- MOSFETs are the most favored components in integrated circuits due to their cost-effectiveness and wide availability.
- The operation of a MOSFET involves the formation of a channel and the impact of voltage and the current.
- The small signal model of the MOSFET includes various capacitances that can occur in the circuit.
- The gate to source capacitance is typically larger than the gate to drain capacitance.