Ultra-low-power compressive-readout integrated circuit design for smart and wearable biosensing
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hdl:2117/368993
Tipus de documentProjecte Final de Màster Oficial
Data2021-09-28
Condicions d'accésAccés restringit per acord de confidencialitat
(embargat fins 2024-06-22T12:10:27Z)
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Abstract
This work presents the design of an ultra-low-power compressive-readout integrated circuit (IC)
for amperometric electrochemical sensors. The application-specific integrated circuit (ASIC) has
been designed in the frame of a project that aims to develop non-invasive integrated wearable
platforms for monitoring the sweat of athletes in real time. The ASIC, which will be part of
the sensing platforms, must be able to measure full scale currents in the order of µA with
resolutions in the order of nA, while consuming a µW-range power in order to provide the
wearable platform with enough energy autonomy. Moreover, the ASIC must include a digital
communication interface for a reliable data transmission.
The amperometric sensor frontend, designed following a full-custom analog IC design methodology, has been realized with a 3-quantization-level asynchronous delta-sigma (∆Σ) modulator
topology. The inclusion of the sensor in the ∆Σ loop has resulted in a compact architecture.
The digital communication backend, designed following a semi-custom digital IC design flow,
has been developed by adapting a serial communication protocol and modifying it to allow
an asynchronous communication of data, which results in an increase of the power efficiency.
To conclude the work, these two blocks have been integrated in a 0.18-µm complementary
metal-oxide-semiconductor (CMOS) technology.
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
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TFM_Javier_Cuenca_final.pdf | 7,380Mb | Accés restringit |