**5. Conclusions**

The paper presented a bulk-driven symmetrical OTA based on a self-cascode current mirror with source degeneration to provide a high-gain, high linearity, and low-*G*m topology. The proposed low-*G*<sup>m</sup> topology shown a valuable performance that is suitable for new biomedical IC applications. In particular, the new topology achieved the lowest power consumption compared with the state-of-art topologies, in addition to high gain, linearity, low transconductance, and IRN. Moreover, the circuit obtained the highest CMRR and high PSRR, which turns the proposed OTA into an interesting topology as a basic block for OTA-C filters.

**Author Contributions:** Conceptualization, R.S.S. and L.H.R.; methodology, R.S.S. and L.H.R.; validation, R.S.S. and L.H.R.; formal analysis, R.S.S. and L.H.R.; investigation, R.S.S. and L.H.R.; resources, C.R.R.; data curation, L.H.R.; writing—original draft preparation, L.H.R.; writing—review and editing, O.A. and C.R.R.; visualization, L.H.R.; supervision, O.A. and C.R.R.; project administration, C.R.R.; funding acquisition, C.R.R. All authors have read and agreed to the published version of the manuscript.

**Funding:** Brazilian National Council for Scientific and Technological Development (CNPq), and to the Coordination of Improvement of Higher Education Personnel—Brazil (CAPES)—Finance Code 001 for partial financial support. This work also has been partially supported in Brazil by PrInt CAPES-UFSC "Automation 4.0".

**Data Availability Statement:** Data are contained within the article.

**Acknowledgments:** The authors are grateful to the Brazilian National Council for Scientific and Technological Development (CNPq), the Coordination of Improvement of Higher Education Personnel— Brazil (CAPES), and CAPES-UFSC PrInt for the financial support.

**Conflicts of Interest:** The authors declare no conflict of interest.
