SCALABLE BANDWIDTH SYSTEM AND CONTROL METHOD OF TUNABLE FILTER

摘要

A scalable bandwidth system and a method for controlling the tunable filter are provided to reduce complexity of hardware without an additional digital-analog converter by using a digital signal as a control signal. A scalable bandwidth system includes a tunable filter part(100) and a controller(200). The tunable filter part includes an inductor(L1) and a plurality of diodes(D1-Dn). The tunable filter part filters pass band corresponding to the inductance corresponding to inductor and the capacitance corresponding to a plurality of diodes. The controller controls the capacitance by using the control bit corresponding to each diode. A first terminal and a second terminal of the inductor are connected to the input terminal and the output terminal of the tunable filter part respectively. The cathode terminal and the anode terminal of each diode are connected to the second terminal and a ground terminal of the inductor.