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oai:repisalud.isciii.es:20.500.12105/180422024-02-12T19:46:06Zcom_20.500.12105_15322com_20.500.12105_2051col_20.500.12105_16927

00925njm 22002777a 4500 dc Hidalgo-López, José A author Sánchez-Durán, José A author Oballe-Peinado, Óscar author 2020-05-02 Direct Interface Circuits (DICs) carry out resistive sensor readings using a resistance-to-time-to-digital conversion without the need for analog-to-digital converters. The main advantage of this approach is the simplicity involved in designing a DIC, which only requires some additional resistors and a capacitor in order to perform the conversion. The main drawback is the time needed for this conversion, which is given by the sum of up to three capacitor charge times and their associated discharge times. This article presents a modification of the most widely used estimation method in a resistive DIC, which is known as the Two-Point Calibration Method (TPCM), in which a single additional programmable digital device pin in the DIC and one extra measurement in each discharge cycle, made without slowing down the cycle, allow charge times to be reduced more than 20-fold to values around 2 µs. The new method designed to achieve this reduction only penalizes relative errors with a small increase of between 0.2% and 0.3% for most values in the tested resistance range. http://hdl.handle.net/10668/15504 http://hdl.handle.net/20.500.12105/18042 32370230 10.3390/s20092596 1424-8220 Sensors (Basel, Switzerland) Calibration methods Direct interface circuits Error analysis Interface sensor Resistive sensor Time-based measurement Reducing Measurement Time in Direct Interface Circuits for Resistive Sensor Readout.