Wideband Buffer using FET and Bipolar Transistor

The schematic diagram shown below is a wide-band buffer circuit. This circuit is formed by FET and transistor. This circuit consist of series-feedback buffer which act as wideband unity-gain amplifier. This wideband unity-gain amplifier has high input impedance due to the low input impedance of 2N5485 FET. Here is the schematic diagram of the circuit: