• A RISC-V based medical implantable SOC for high voltage a current tissue stimulus 

      Arnaud Maceira, Alfredo; Gak Szollosy, Joel; García Ramírez, Ronny; Rimolo Donadio, Renato; Miguez De Mori, Matías Rafael; Puyol, Rafael; Solera Bolanos, Edgar; Castro González, Reinaldo; Molina Robles, Roberto; Chacón Rodríguez, Alfonso (IEEE, 2020)
      A RISC-V based System on Chip (SoC) for high voltage and current tissue stimulus, targeting implantable medical devices, is presented. The circuit is designed in a 0.18μm HV-CMOS process, including the RISC-V 32RVI based ...
    • A Self-biased Current Source, using an Asymmetric Bulk-modified MOS Composite Transistor 

      Costa, Diego; Míguez, Matías; Gak Szollosy, Joel; Arnaud Maceira, Alfredo (IEEE, 2020)
      In this work a new topology for a self-biased current reference, based on an asymmetric bulk-modified MOS (ABM) composite transistor is presented. Two current references based in this technique were designed: a 13.5nA ...
    • An asymmetrical bulk-modified composite MOS transistor with enhanced linearity 

      Arnaud Maceira, Alfredo; Chacón Rodríguez, Alfonso; Miguez de Mori, Matías Rafael; Gak Szollosy, Joel; Puyol, Rafael (IEEE, 2019)
      In this work, an asymmetrical bulk-linearized composite MOSFET is presented, with an enhanced linear range and an equivalent saturation voltage of up to several hundred mV even in weak inversion, allowing to implement ...
    • An Integrated 350V Dimmer 

      Torres Álvarez, Fabián; Gak Szollosy, Joel; Arnaud Maceira, Alfredo; Míguez, Matías (IEEE, 2020)
      The design of an almost fully integrated phase-cut dimmer is presented. The circuit was designed on a 1um ultra high voltage (UHV) MOS technology in a silicon-on-insulator (SOI) wafer. The dimmer can operate with a duty ...
    • CMOS level shifters from 0 to 18 V output 

      Gak Szollosy, Joel; Arnaud Maceira, Alfredo; Miguez de Mori, Matías Rafael (Springer, 2021)
      A design methodology for level shifters voltage translators, where the output voltage ranges from 0 to 18 V, and the input voltage ranges from 2 to 5.5 V in a 0.6 lm CMOS-HV technology, is presented. This family of circuits ...
    • Integrated programmable current source for implantable medical devices 

      Rimolo Donadio, Renato; Chacón Rodríguez, Alfonso; Gak Szollosy, Joel; García Ramírez, Ronny; Miguez de Mori, Matías Rafael; Arnaud Maceira, Alfredo; Hardy, D.; Agis, L.; Nakasone Lanza, Kenji Sebastián (IEEE, 2020)
      In this work, the design and implementation of a 25mA (max), 8 bits integrated programmable current source for implantable medical devices is presented. The proposed circuit includes a six-bits trimming mechanism to balance ...
    • Siwa: A custom RISC-V based system on chip (SOC) for low power medical applications 

      García Ramírez, Ronny; Chacón Rodríguez, Alfonso; Molina Robles, Roberto; Castro González, Reinaldo; Solera Bolanos, Edgar; Madrigal Boza, Gabriel; Oviedo Hernández, Marco; Salazar Sibaja, Diego; Sánchez Jiménez, Dayhana; Fonseca Rodríguez, Melissa; Arrieta Solorzano, Johan; Rimolo Donadio, Renato; Arnaud Maceira, Alfredo; Miguez de Mori, Matías Rafael; Gak Szollosy, Joel (Elsevier, 2020)
      This work introduces the development of Siwa, a RISC-V RV32I 32-bit based core, intended as a flexible control platform for highly integrated implantable biomedical applications, and implemented on a commercial 0.18 𝜇m ...
    • Siwa: a RISC-V RV32I based micro-controller for implantable medical applications 

      García Ramírez, Ronny; Chacón Rodríguez, Alfonso; Castro González, Reinaldo; Arnaud Maceira, Alfredo; Miguez de Mori, Matías Rafael; Gak Szollosy, Joel; Molina Robles, Roberto; Madrigal Boza, Gabriel; Oviedo Hernández, Marco; Solera Bolanos, Edgar; Salazar Sibaja, Diego; Sánchez Jiménez, Dayhana; Fonseca Rodríguez, Melissa; Arrieta Solorzano, Johan; Rimolo Donadio, Renato (IEEE, 2020)
      The design of Siwa1, a compact low power custom system on chip (SoC), targeted for implantable/wearable applications, is reported in this paper. Siwa is based on a RISC-V RV32I architecture. It has a centrally controlled ...