Title :
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
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;
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
DOI :
10.1109/MWSCAS.2001.986162
