He put the 555 and some other parts together to create his own L meter. The writeup includes the theory behind this meter, with an incoming AC source converted to a voltage by an RC network.

Active inductors are becoming increasingly important in the design of radio frequency (RF) circuits, particularly in CMOS technology. These components offer several advantages over traditional ...

Coupling coefficient: A measure of how effectively magnetic flux is shared between two inductors or coils. Quality factor (Q): A dimensionless parameter that describes how underdamped an ...