Sixth order baseband variable LPF using new tunable operational amplifier

A sixth order reconfigurable low pass filter (LPF) is realized in this paper using 0.25 ¿m CMOS technology model. The filter is based on cascading connection of bi-quadratic Active-G m -RC cells. The Active-G m cells are realized using compensated op-amps with variable transconductance gain and vari...

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Bibliographische Detailangaben
Hauptverfasser:	Fahmy, S.M., Soliman, E.A., Mahmoud, S.A.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Baseband Capacitors CMOS technology Cutoff frequency Flexible op-amp (FLOA) Gain Gain bandwidth product (GBW) Low pass filters Operational amplifiers Semiconductor device modeling Software defined radio (SDR) Transconductance Tuning unity gain frequency (ω u )
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Beschreibung
Zusammenfassung:	A sixth order reconfigurable low pass filter (LPF) is realized in this paper using 0.25 ¿m CMOS technology model. The filter is based on cascading connection of bi-quadratic Active-G m -RC cells. The Active-G m cells are realized using compensated op-amps with variable transconductance gain and variable compensation capacitors (Variable G m -C c op-amp). The tuning range of the filter's cutoff frequency is from 77.4 KHz to 37.78MHz. The filter operates from single supply of 1.7V. Simulations results using PSPICE for the proposed reconfigurable LPF are presented. Comparisons with previous work in are included to view the points of strength for the proposed architecture.
ISSN:	2159-1660
DOI:	10.1109/ICM.2009.5418611