CMOS digitally programmable cell for high frequency amplification and filtering

Author

Calvo, Belén ; Celma, Santiago ; Sanz, M. Teresa

Author_Institution

Group of Electron. Design, Zaragoza Univ., Spain

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

This paper presents an approach to the implementation of systems combining variable gain amplifiers (VGA) and programmable continuous-time G_m-C filters in the video frequency range. The technique relies on the use of a versatile high-performance transconductance amplifier as an active cell. Simulation results from 35 μm designs supplied at 3.3 V show a 0 to 16 dB gain setting range for the VGA, while G_m-C integrators present a wide tuning range (10 to 100 MHz), with no degradation of the dynamic range (better than 60 dB) and low excess phase (<0.5°) over the whole tuning range.

Keywords

CMOS integrated circuits; UHF amplifiers; continuous time filters; gain control; integrating circuits; programmable circuits; 0 to 16 dB; 10 to 100 MHz; 3.3 V; 35 micron; CMOS digitally programmable cell; G_m-C integrators; active cell; circuit simulation; continuous-time filters; dynamic range; high frequency amplification; high frequency filtering; programmable filters; transconductance amplifier; tuning range; variable gain amplifiers; video frequency range; Digital filters; Dynamic range; Filtering; Frequency; Gain; Resistors; Transconductance; Transconductors; Tuning; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328221

Filename

1328221