Tunable CMOS RF Filter Design for New Generation of Mobile Communications 3GPP LTE

This paper proposes the design of a tunable radiofrequency filter based on the switched capacitor techniques. This circuit, which can replace high-Q external passive filters, allows a high selectivity with a tunable center frequency range of 400 MHz [700-1100 MHz], with quality factor up than 1100. Implemented in 0.18 μm CMOS technology, this circuit is intended to be used for the next generation of mobile communications 3GPP LTE which requires a very high-Q characteristic. Key-Words: Tunable, CMOS, filter, radiofrequency, high-Q, 3GPP LTE