A UHF CMOS Gm-C bandpass filter and automatic tuning design

Author

Zhiqiang, Gao ; Zhiheng, Lin ; Zhengxiong, Hou ; Yonglai, Zhang ; Xinyuan, Zhao

Author_Institution

Microelectron. Center, Harbin Inst. Technol., Harbin, China

fYear

2010

fDate

July 28 2010-Aug. 1 2010

Firstpage

381

Lastpage

385

Abstract

A CMOS Gm-C bandpass filter using improved Nauta´s transconductor and its matched oscillator are presented. The filter can be operated at ultra high frequency (UHF) band with a high quality factor. Quality factor and frequency tuning is also considered. The simulated results show that the center frequency of the filter using TSMC 0.18μm CMOS process can be operated at about 800MHz under 3.3V supply. To match the filter, the oscillator designed is based on the archetype of the filter and the simulation presents that they are in a good match. An application of the above filter and oscillator in a phase lock loop (PLL) technique for continuous time auto-tuning filter is simply introduced.

Keywords

CMOS analogue integrated circuits; Q-factor; UHF filters; UHF oscillators; band-pass filters; phase locked loops; voltage-controlled oscillators; TSMC CMOS; UHF CMOS Gm-C bandpass filter; UHF band; automatic tuning design; continuous time autotuning filter; frequency 800 MHz; frequency tuning; matched oscillator; phase lock loop; quality factor; size 0.18 mum; voltage 3.3 V; Band pass filters; Filtering theory; Low pass filters; Matched filters; Tuning; Voltage-controlled oscillators; Automatic tuning; Gm-C bandpass filter; Nauta´s transconductor; VCO;

fLanguage

English

Publisher

ieee

Conference_Titel

Laser Physics and Laser Technologies (RCSLPLT) and 2010 Academic Symposium on Optoelectronics Technology (ASOT), 2010 10th Russian-Chinese Symposium on

Conference_Location

Harbin

Print_ISBN

978-1-4244-5511-9

Type

conf

DOI

10.1109/RCSLPLT.2010.5615323

Filename

5615323