Carrillo, Juan M.Ocampo-Hidalgo, Juan J.Corbacho, IsraelCruz Blas, Carlos Aristóteles de laDomínguez, Miguel Á.2024-09-052024-09-052024Carrillo, J. M., Ocampo-Hidalgo, J. J., Corbacho, I., De la Cruz-Blas, C. A., Domínguez, M. Á. (2024) 0.6-V CMOS bulk-driven instrumentation amplifier for IoMT bioimpedance analysis. International Journal of Circuit Theory and Applications, 1-15. https://doi.org/10.1002/cta.4008.0098-988610.1002/cta.4008https://academica-e.unavarra.es/handle/2454/51555An instrumentation amplifier (IA), aimed at wideband bioimpedance analysisin the low-voltage low-power scenario of internet of medical things (IoMT), ispresented. The operation principle is based on the indirect current feedbacktechnique, where an input and a feedback transconductor determine thevoltage gain of the preamplifier. The required transconductors consist of twobulk-driven flipped-voltage-follower cells and an active pseudo-resistor, thusleading to a linear and compact implementation. The circuit has been designedand fabricated in 180 nm CMOS technology to operate with a 0.6-V supply.Experimental results obtained from measurements on eight samples of thesilicon prototype show that when the IA is programmed to have a nominalvoltage gain of 11 V/V, the bandwidth is 316.2 kHz, the CMRR exceeds63 dB, and the maximum output voltage that can be processed with a THDbelow –40 dB is 555 mVpp.application/pdfeng© 2024 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License.BioimpedanceBulk-drivenFlipped voltage followerIndirect current feedbackInstrumentation amplifierinfo:eu-repo/semantics/article2024-09-05info:eu-repo/semantics/openAccess