Realization of an analog biquadratic filter using log-domain techniques

Author

Agrawal, Shishir ; Kumar, Anand ; Carter, Harold W.

Author_Institution

Dept. of ECECS, Cincinnati Univ., OH, USA

Volume

1

fYear

2001

fDate

2001

Firstpage

255

Abstract

We propose the design of a biquadratic filter using log domain filtering techniques. The filter is designed using a purely current-mode approach. This biquadratic filter realizes low pass, high pass, band pass, band elimination and all pass filter functions. The designed filter is electronically tunable over several decades of frequency by changing the magnitude of current source. The complexity is low as current mirrors are used as opposed to operational amplifiers, gyrators or OTAs

Keywords

all-pass filters; analogue processing circuits; band-pass filters; band-stop filters; biquadratic filters; current mirrors; current-mode circuits; high-pass filters; low-pass filters; OTAs; all pass filter functions; analog biquadratic filter; band elimination filter functions; band pass filter functions; biquadratic filter; biquadratic filter design; current mirrors; current source magnitude; current-mode approach; electronically tunable filter design; filter complexity; gyrators; high pass filter functions; log domain filtering technique; log-domain techniques; low pass filter functions; operational amplifiers; Band pass filters; Capacitors; Equations; Filtering; Frequency; Low pass filters; Operational amplifiers; Transconductors; Tunable circuits and devices; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on

Conference_Location

Dayton, OH

Print_ISBN

0-7803-7150-X

Type

conf

DOI

10.1109/MWSCAS.2001.986162

Filename

986162