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Published August 28, 2023 | Version v1
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Design of a Linear Transconductance OTA using the Open Sky130 Process Design Kit

Authors/Creators

  • 1. Faculdade de Engenharia Universidade Federal de Juiz de Fora Juiz de Fora, Brazil

Description

Abstract: This paper describes the design, layout and simulation of a linear transconductance Operational Transconductance Amplifier (OTA) using the SkyWater 130 nm open Process Design Kit (PDK). By using a known source degeneration technique, it is possible to either decrease and linearize the transconductance of the OTA for a wider range of input voltages, making it proper for use on Gm-C filters. Only open source tools, suited for the Sky130 PDK, were used in this design, showing the applicability to analog designs

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References

  • C. A. Laber and P. R. Gray, "A 20-MHz Sixth-Order BiCMOS Parasitic-Insensitive Continuous-Time Filter and Second-Order Equalizer Optimized for Disk-Drive Read Channels," IEEE IEEE Journal of Solid-State Circuits, vol. 28, no. 4, pp. 462-470, April 1993.
  • R. F. L. Moreno, "Filtro Anti-aliasing gm-C totalmente diferencial e sintonizável", final paper (in portuguese). Escola Politécnica da Universidade Federal do Rio de Janeiro, June 2009.
  • G. Eason, B. Noble, and I. N. Sneddon, "On certain integrals of Lipschitz-Hankel type involving products of Bessel functions," Phil. Trans. Roy. Soc. London, vol. A247, pp. 529–551, April 1955.
  • L. J. Stotts, "Introduction to Implantable Biomedical IC Design," IEEE Circuits and Devices Magazine, pp. 12-18, January 1989.
  • Y. P. Tsividis, "Integrated Continuous-Time Filter Design - An Overview," IEEE Jornal of SOlid-State Circuits, vol. 29, no. 3, pp. 166-176, March 1994.
  • M. X. Ferreira, T. M. Mendes, L. R. M. Silva, E. C. Teixeira, C. A. Duque, "A Gm-C Filter Bank for Supraharmonic Analysis Application". In: 20th Microelectronics Student Forum (SForum 2020) - Chip in the Fields, virtual event, 2020.
  • M. J. P. Cunha, A. B. Moreira, M. X. Ferreira and E. C. Teixeira, "Design and Transistor-Level Simulation of a High- Order Gm-C Filter Bank," In: 22nd Microelectronics Student Forum (SForum 2022) - Chip in Minuano, virtual event, 2022.
  • Predictive Technology Model, Latest models. Available at: https://ptm.asu.edu/. Access 10 June 2023.
  • A. Veeravalli, E. S´anchez-Sinencio, J. Silva-Mart´ınez, "Transconductance amplifier structures with very small transconductances: a comparative design approach". IEEE Journal of Solid-state Circuits, v. 37, n. 6, pp. 770-775, 2002.
  • K. Garradhi, N. Hassen, K. Besbes, "Low-Voltage and Low-Power OTA Using Source-Degeneration Technique and Its Application in Gm-C Filter". In: 2016 11th International Design & Test Symposium (IDT), pp. 221-226, 2016.
  • Skywater Open Source PDK. Available at: https://github.com/google/skywater-pdk. Access 08 June 2023.
  • A. Pajkanovic, "Open Source CMOS General Purpose Operational Amplifier". In: Proc. 2021 IEEE 32nd International Conference on Microelectronics (MIEL), Niˇs, Serbia, 2021.
  • W. M. M. Oliveira, F. Brito-Filho, "Development of a Baseband Amplifier for a 130 nm CMOS process using open-source design flow". In: International Symposium on Instrumentation Systems, Circuits and Transducers – INSCIT 2022 - Chip in Minuano, virtual event, Brazil, 2022.
  • SkyWater SKY130 PDK, Device Details. Available at: https://skywaterpdk.readthedocs.io/en/main/rules/device-details.html. Access June 12, 2023.
  • Sky130 for KLayout. Available at: https://github.com/laurentc2/SKY130 for KLayout. Access 10 June 2023.