A tunable, video-frequency, low-power, single-amplifier biquadratic filter in CMOS

Author

Schmid, Hanspeter ; Moschytz, George S.

Author_Institution

Inst. for Signal & Inf. Process., Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

2

fYear

1999

fDate

36342

Firstpage

128

Abstract

In this paper, a tunable single-amplifier biquadratic lowpass filter is presented. It consists of one balanced low-gain current amplifier and a second-order MOSFET-C feedback network. The filter was integrated in a double-poly 0.6 μm CMOS process and operates from a 3.3 V power supply. The pole frequency is tunable from 15.2 to 17.2 MHz, the pole Q is 3, the spurious-free dynamic range is at least 60 dB, and the filter consumes only 2.4 mW per pole. Furthermore, the active area used per pole is only 0.06 mm². The filter is well suited for low-power video-frequency applications, and demonstrates that the MOSFET-C filter technique can be applied successfully to filters other than those based on integrator-connected topologies

Keywords

CMOS analogue integrated circuits; biquadratic filters; circuit feedback; circuit tuning; low-pass filters; low-power electronics; operational amplifiers; radiofrequency filters; 0.6 micron; 15.2 to 17.2 MHz; 3.3 V; MOSFET-C filter technique; active filter; balanced low-gain current amplifier; double-poly CMOS process; low-power filter; lowpass filter; second-order MOSFET-C feedback network; single-amplifier biquadratic filter; tunable monolithic filter; tunable pole frequency; video-frequency filter; Active filters; Band pass filters; CMOS process; Energy consumption; Feedback; Frequency; Harmonic distortion; MOSFET circuits; Power filters; Tunable circuits and devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.780635

Filename

780635