Fagnaldo Braga Pontes
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Fagnaldo Braga Pontes has a total of 3 co-authors. Here are the top co-authors by number of shared publications:
- Alexandre Kennedy Pinto Souza
Federal University of Amazonas and Senai Institute of Innovation in Microelectronics, Brazil
1 shared publication - Carlos Augusto de Moraes Cruz
Federal University of Amazonas, Brazil
1 shared publication - Élvio Carlos Dutra e Silva Junior
Federal University of Amazonas and Senai Institute of Innovation in Microelectronics, Brazil
1 shared publication
Latest Publications
- Open Access
- 9 September 2024
- Published by MDPI AG in Preprints.org
Current Mirror Improved Potentiostat (CMIPot) for Three Electrode Electrochemical Cell
This work presents a novel compact CMOS potentiostat designed circuit for electrochemical cell. The proposed topology functions as a circuit interface, controlling the polarization of voltage signals at the sensor electrodes and facilitating current measurement during the oxidation-reduction process of a analyzed solution. The potentiostat, designed for CMOS technology, comprises a two-stage amplifier, two current mirror blocks coupled to this amplifier, and a CMOS push-pull output stage. It employs the electrochemical method of cyclic voltammetry, operating within voltage range of ±0.8 V and scan rates of 10mV/s, 25mV/s, 100mV/s and 250 mV/s. The circuit is capable of reading currents ranging from 10 µA to 500 µA. Experimental results were obtained using a potassium ferrocyanide (K3(FeCN)6) redox solution with concentrations of 10, 15 and 20 mmol/L, and their corresponding voltammograms were evaluated. The experimental results from a discrete circuit demonstrate that the proposed potentiostat topology produces outcomes consistent with those of classical topologies presented in the literature and industrial equipment.
- 9 September 2024
- Published by MDPI AG in Preprints.org
Open AccessCurrent Mirror Improved Potentiostat (CMIPot) for Three Electrode Electrochemical Cell
This work presents a novel compact CMOS potentiostat designed circuit for electrochemical cell. The proposed topology functions as a circuit interface, controlling the polarization of voltage signals at the sensor electrodes and facilitating current measurement during the oxidation-reduction process of a analyzed solution. The potentiostat, designed for CMOS technology, comprises a two-stage amplifier, two current mirror blocks coupled to this amplifier, and a CMOS push-pull output stage. It employs the electrochemical method of cyclic voltammetry, operating within voltage range of ±0.8 V and scan rates of 10mV/s, 25mV/s, 100mV/s and 250 mV/s. The circuit is capable of reading currents ranging from 10 µA to 500 µA. Experimental results were obtained using a potassium ferrocyanide (K3(FeCN)6) redox solution with concentrations of 10, 15 and 20 mmol/L, and their corresponding voltammograms were evaluated. The experimental results from a discrete circuit demonstrate that the proposed potentiostat topology produces outcomes consistent with those of classical topologies presented in the literature and industrial equipment.