Hello Andy ,This driver is being built to be connected to a PI Controller which needs to tune my YIG into the resonance of the resonator. The data about the YIG and the resonance dip properties shown in the phots below. given the Q factor of the resonance shown below and the properties of the FM coil which we are driving to tune the yig. What circuit properties you think I need to to have for my controller ? Thanks. sesitivity: 450 KHz/mA 3dB bandwidth 2.2MHz resistance 2Ohm inductance 1.5uH /g/electronics101/photo/296358/3868513?p=Created%2C%2C%2C20%2C2%2C0%2C0 /g/electronics101/photo/296358/3868514?p=Created%2C%2C%2C20%2C2%2C0%2C0