Hi there, I am supposed to measure the electrical impedance (which depends on conductivity) of an electrically conducting object by use of eddy current technique induced by an air core coil. for this purpose I need to print a circuit. would you please help me with the characteristics and out put of the circuit. what kind of electronics devices should I use and how to design the circuit. The coil has a few centimeter in diameter and less than 100 turns of very small cross sectional wire that should be loaded with frequency in range of 100kHz- 10MHz. Thank you in advance.