Design of a CMOS Highly Linear Channel-Select Filter and Programmable Gain Amplifier for a WPAN Zero-IF Receiver

Author

Moon, Yeon Kug ; Seo, Hae-Moon ; Park, Yong-Kuk ; Won, Kwang-Ho ; Yoon, Myung-Hyun ; Yoo, June-Jae ; Kim, Seong-Dong

Author_Institution

Ubiquitous Comput. Res. Center, Korea Electron. Technol. Inst.

fYear

2005

fDate

5-5 Oct. 2005

Firstpage

450

Lastpage

453

Abstract

This paper describes a low-voltage and low-power channel selection analog front end with continuous-time low pass filters and highly linear programmable-gain amplifier (PGA). The filters were realized as balanced Gm-C biquadratic filters to achieve a low current consumption. High linearity and a constant wide bandwidth are achieved by using a new transconductance (Gm) cell. The PGA has a voltage gain varying from 0 to 65 dB, while maintaining a constant bandwidth. A filter tuning circuit that requires an accurate time base but no external components is presented. With a 1-Vrms differential input and output, the filter achieves -85 dB THD and a 78 dB signal-to-noise ratio. Both the filter and PGA were implemented in a 0.18 mum 1P6M n-well CMOS process. They consume 3.2 mW from a 1.8 V power supply and occupy an area of 0.19 mm ²

Keywords

CMOS analogue integrated circuits; biquadratic filters; circuit tuning; integrated circuit design; low-pass filters; low-power electronics; personal area networks; programmable circuits; radio receivers; radiofrequency amplifiers; radiofrequency integrated circuits; 0 to 6 dB; 0.18 mum; 1.8 V; 3.2 mW; 78 dB; CMOS; WPAN zero-IF receiver; balanced Gm-C biquadratic filters; continuous-time low pass filters; filter tuning circuit; highly linear channel-select filter; low-power analog front end; low-voltage analog front end; programmable gain amplifier; Band pass filters; Bandwidth; Circuit optimization; Electronics packaging; Linearity; Low pass filters; Nonlinear filters; Signal to noise ratio; Transconductance; Voltage; Channel selection filters; DC offset; programmable gain amplifier; tuning circuit;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2005 Asia-Pacific Conference on

Conference_Location

Perth, WA

Print_ISBN

0-7803-9132-2

Type

conf

DOI

10.1109/APCC.2005.1554099

Filename

1554099