dc.creator | Miguez, Matías R. | |
dc.creator | Gak, Joel | |
dc.creator | Arnaud, Alfredo | |
dc.creator | Oliva, Alejandro Raul | |
dc.creator | Julian, Pedro Marcelo | |
dc.date.accessioned | 2019-10-18T18:39:39Z | |
dc.date.accessioned | 2022-10-15T03:42:49Z | |
dc.date.available | 2019-10-18T18:39:39Z | |
dc.date.available | 2022-10-15T03:42:49Z | |
dc.date.created | 2019-10-18T18:39:39Z | |
dc.date.issued | 2018-05 | |
dc.identifier | Miguez, Matías R.; Gak, Joel; Arnaud, Alfredo; Oliva, Alejandro Raul; Julian, Pedro Marcelo; A current-reuse biomedical amplifier with a NEF < 1; Springer; Journal Of Analog Integrated Circuits And Signal Processing; 95; 2; 5-2018; 283-294 | |
dc.identifier | 0925-1030 | |
dc.identifier | http://hdl.handle.net/11336/86430 | |
dc.identifier | 1573-1979 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4341317 | |
dc.description.abstract | Noise Efficiency Factor (NEF) is the most employed figure of merit to compare different low-noise biomedical signal amplifiers, taking into account current consumption, noise, or bandwidth trade-offs. A small NEF means a more efficient amplifier, and was assumed to be always NEF > 1 (an ideally efficient single BJT amplifier). In this work current-reuse technique will be utilized to exceed this limit in a very efficient CMOS amplifier. A micro-power, ultra-low-noise amplifier, aimed at electro-neuro-graph signal recording in a specific single-channel implantable medical device, is presented. The circuit is powered with a standard medical grade 3.6 V(nom) secondary battery. The amplifier input stage stacks twelve differential pairs to maximize current-reuse. The differential pair stacking technique is very efficient: allows most of the energy to be dissipated in the input transistors that amplify and not in mirror or bias transistors, and allows also the input transistors to operate with a reduced VDS just above saturation. The amplifier was implemented in a 0.6 μm technology, it has a total gain of almost 80 dB, with a 4 kHz bandwidth. The measured input referred noise is 4.5 nV/Hz1/2@1 kHz, and 330 nVrms in the band of interest, with a total current consumption of only 16.5 μA from the battery (including all the 4 stages and the auxiliary circuits). The measured NEF is only 0.84, below the classic NEF = 1 limit. | |
dc.language | eng | |
dc.publisher | Springer | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s10470-018-1175-8 | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s10470-018-1175-8 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | AMPLIFIER | |
dc.subject | BIOMEDICAL | |
dc.subject | CMOS | |
dc.subject | CURRENT-REUSE | |
dc.title | A current-reuse biomedical amplifier with a NEF < 1 | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |