SYSTEM FOR RADIO FREQUENCY FILTER USING CIRCUIT FOR INTENSIFYING QUALITY FACTOR

摘要

An RF filter system using a Q factor reinforcement circuit is provided. The RF filter system comprises the Q factor reinforcement circuit including; an RF filter which passes a fixed frequency band only; a trans-conductance unit which is connected to the RF filter and compensates a leakage current due to a resistance component generated in the RF filter based on a terminal voltage of the RF filter; a current mirror unit which prevents the reversal of current by mirroring an output voltage of the trans-conductance unit; and a buffer unit which prevent the reversal of voltage by buffering the output voltage which is fed back from an output terminal. At that time, a plurality of RF filters and a plurality of Q factor reinforcement circuits are included. The RF filter includes a standard RF filter and one or more control RF filters. The Q factor reinforcement circuits are connected to the standard RF filter and at least one control RF filter to be faced.