RT info:eu-repo/semantics/article T1 Programmable gain amplifiers with DC suppression and low output offset for bioelectric sensors A1 Carrera González, Albano A1 Rosa Steinz, Ramón de la A1 Alonso Alonso, Alonso K1 Bioelectric sensors K1 Biomedical electronics K1 Amplifiers K1 High-pass filters K1 33 Ciencias Tecnológicas AB DC-offset and DC-suppression are key parameters in bioelectric amplifiers. However, specific DC analyses are not often explained. Several factors influence the DC-budget: the programmable gain, the programmable cut-off frequencies for high pass filtering and, the low cut-off values and the capacitor blocking issues involved. A new intermediate stage is proposed to address the DC problem entirely. Two implementations were tested. The stage is composed of a programmable gain amplifier (PGA) with DC-rejection and low output offset. Cut-off frequencies are selectable and values from 0.016 to 31.83 Hz were tested, and the capacitor deblocking is embedded in the design. Hence, this PGA delivers most of the required gain with constant low output offset, notwithstanding the gain or cut-off frequency selected. PB MDPI YR 2013 FD 2013 LK https://uvadoc.uva.es/handle/10324/57540 UL https://uvadoc.uva.es/handle/10324/57540 LA eng NO Sensors, 2013, vol. 13, n. 10, p. 13123-13142 NO Producción Científica DS UVaDOC RD 29-mar-2024