Abstract
A design solution for bulk-driven tunable transconductor capable of working under extremely low supply/consumption with rail-to-rail input common-mode range is presented in this work. The proposed transconductor topology consists of six bulk-driven CMOS inverters, and it uses a very simple biasing circuit for the transconductance tuning. The design robustness was verified for 0.5 and 0.25 V power supplies offering the advantages of the current-controlled input transconductance. For 0.5 V power supply, the proposed transconductor has 0.075–10.2 \(\upmu \hbox {S}\) transconductance tuning range, input-referred intercept point IP3 = 1.81 V, and 4.62 MHz bandwidth for 3 \(\upmu \hbox {A}\) current consumption. The design robustness of the tunable transconductor was verified by means of computer simulation using triple-well 0.18 \(\upmu \hbox {m}\) CMOS process.








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Acknowledgments
Research described in this paper was financed by the National Sustainability Program under Grant LO1401 and by the Czech Science Foundation under Grant No. P102-15-21942S. For the research, infrastructure of the SIX Center was used.
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Khateb, F., Kulej, T. & Vlassis, S. Extremely Low-Voltage Bulk-Driven Tunable Transconductor. Circuits Syst Signal Process 36, 511–524 (2017). https://doi.org/10.1007/s00034-016-0329-0
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DOI: https://doi.org/10.1007/s00034-016-0329-0