ARTÍCULO

A 0.6 V and 0.395 pJ/bit nonius TDC for a passive RFID pressure sensor tag

Autores: Jiménez Irastorza, Ainara; Beriain Rodríguez, Andoni (Autor de correspondencia); Sevillano Berasategui, Juan Francisco; Rebollo, I.; Berenguer Pérez, Roque José
Título de la revista: ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING
ISSN: 0925-1030
Volumen: 91
Número: 3
Páginas: 433 - 444
Fecha de publicación: 2017
Lugar: WOS
Resumen:
This work presents a nonius time to digital converter (TDC) adapted to a passive RF identification (RFID) pressure sensor tag. The proposed converter exploits the characteristics of time-based sensor interfaces and allows reducing voltage supply and power consumption while maintaining resolution and conversion efficiency. The nonius TDC has been designed and fabricated using the TSMC 90 nm standard CMOS technology. The main blocks of the converter are described and both the resolution adjustment and measurement processes are explained in detail. Measurement results show 10.49 bits of effective resolution for an input time range from 28.19 to 42.93 mu s. With a sampling rate of 19 KS/s the converter has a conversion efficiency of 0.395 pJ/bit with a voltage supply of only 0.6 V. This characteristics in the proposed nonius TDC enables an increased reading range of the passive RFID pressure sensor tag.