6.2 Resonant Driving Based on Paralleled Branch
6.3 Self-driven Resonant Circuit
6.3.1 Basic Self-driven Resonant Circuit
6.3.2 Self-driven Resonant Circuit Based on Paralleled Branch Between Gate and Source
6.3.3 Self-driven Resonant Circuit Based on Paralleled Branch Between Drain and Gate
6.3.4 Example of Self-driven Circuit
7 Air-Core Planar Inductors and Transformers on PCB
7.1 Constant Width Planar Inductors
7.1.1 Calculation of Planar Circular Inductor
7.1.2 Calculation of Planar Square Spiral Winding
7.2 Variable Width Planar Inductors

7.2.1 Calculation of Variable Width Winding Structure
7.2.2 Optimal of Variable Width Winding Structure
7.3 Variable Width Planar Transformer
References
8 Passive and Active Components in Multi-MHz Converter
8.1 Multi-MHz Magnetic Components
8.2 Multi-MHz Active Devices
8.3 Testing Method
References
9 Flexible Multi-MHz DC-DC Converter
9.1 Flexible Planar Air-Core Inductor
9.2 Design of Matching Network
9.3 Experimental Results
9.4 Conclusion