A CMOS quality factor enhanced parallel resonant LC-tank with independent Q and frequency tuning for RF integrated filters

Author

Nakaska, Joshua K. ; Haslett, James W.

fYear

2005

fDate

20-24 July 2005

Firstpage

96

Lastpage

100

Abstract

A new quality factor enhanced resonator core is presented and used to design a bandpass filter at 2.4GHz. The new Q-enhanced LC-tank has independent Q tuning capability, which substantially simplifies the automatic Q-tuning problem. In simulation, the unloaded Q-enhanced core consumes 7.05mA from a 1.8V supply in 0.18μm CMOS and can be tuned from 2.1GHz to 3.5GHz using varactors. A brief discussion of the proposed automatic Q-tuning system is presented. The synthesized 2.45GHz filter has a bandwidth of 148MHz, 0dB insertion loss over a 10% tuning range, and a 1^st order compression point of -0.5dBm at 2.35GHz.

Keywords

CMOS integrated circuits; Q-factor; UHF filters; band-pass filters; circuit tuning; resonator filters; 0.18 micron; 1.8 V; 148 MHz; 2.1 to 3.5 GHz; 7.05 mA; CMOS integrated circuits; RF integrated filter; automatic Q-tuning system; bandpass filter; frequency tuning; independent Q-tuning; insertion loss; parallel resonant LC-tank; quality factor; resonator core; varactor; Capacitance; Circuit optimization; Databases; Filters; Passband; Q factor; Radio frequency; Resonance; Resonant frequency; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

System-on-Chip for Real-Time Applications, 2005. Proceedings. Fifth International Workshop on

Print_ISBN

0-7695-2403-6

Type

conf

DOI

10.1109/IWSOC.2005.5

Filename

1530922