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Vol. 188, Issue 5, May 2015, pp. 15-25




Universal Sensors and Transducers Interface for Mobile Devices:
Metrological Characteristics

* Sergey Y. YURISH and Javier CAŇETE,

Excelera, S. L., Parc UPC-PMT, Edificio RDIT-K2M, c/ Esteve Terradas, 1, 08860, Castelldefels, Barcelona, Spain
1 Tel.: +34 93 4137941

E-mail: sergey.yurish@excelera.io, javier.canete@excelera.io


Received: 31 March 2015 /Accepted: 30 April 2015 /Published: 29 May 2015

Digital Sensors and Sensor Sysstems


Abstract: An experimental investigation of metrological characteristics of designed Universal Sensors and Transducers Interface (USTI-MOB) integrated circuit is described in the article. The USTI- MOB is based on the four novel patented methods for frequency (period), its ratio, phase shift and duty- cycle measurements, and has a non-redundant conversion time. Experiments have confirmed the high metrological performance at low power consumption (0.35 mA current consumption at Vcc = 1.8 V). So, the relative error of frequency and period measurements is constant in the whole specified measuring range of frequencies (from 0.25 Hz to 1.95 MHz) and with 95 % confidence does not exceed 0.00089 % in the worst case. Metrological characteristics of measurements of other frequency-time parameters of signals make the USTI-MOB very suitable for various sensor systems design for mobile devices, IoT, etc.


Keywords: Universal Sensors and Transducers Interface, USTI-MOB, frequency-to-digital conversion, frequency measurement, period measurement, time measurement, rotational speed measurement


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