Bulk linearized CMOS diﬀerential pair transconductor for continuous-time OTA-C ﬁlter design

Bogdan Pankiewicz; Stanisław Szczepański; Marek Wójcikowski

Bulk linearized CMOS diﬀerential pair transconductor for continuous-time OTA-C ﬁlter design

Abstract

In this paper, the MOS diﬀerential pair driven simultaneously from gates and bulk terminals is described. An approximated analytical solution of the voltage to current transfer function has been found for the proposed circuit. Four possible combinations of gate and bulk connections of the input signal are presented. Basing on the conﬁguration giving the best linearity, the operational transconductance ampliﬁer (OTA) has been designed and compared, by computer simulations, to the ampliﬁer utilizing the gate driven classic MOS pair. 3rd order ﬁlters using the OTAs with linearized and simple MOS pair have been designed and the resulting parameters have been compared. Linearization through the presented simultaneous use of gate and bulk terminals seems to be useful for low voltage applications.

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: Bulletin of the Polish Academy of Sciences-Technical Sciences no. 62, edition 1, pages 77 - 84,
ISSN: 0239-7528
Language:: English
Publication year:: 2014
Bibliographic description:: Pankiewicz B., Szczepański S., Wójcikowski M.: Bulk linearized CMOS diﬀerential pair transconductor for continuous-time OTA-C ﬁlter design// Bulletin of the Polish Academy of Sciences-Technical Sciences. -Vol. 62, iss. 1 (2014), s.77-84
Verified by:: Gdańsk University of Technology