A high performance analog front-end for intelligent tyre MEMS accelerometer sensor is presented in this paper. The analog front-end is part of a bigger System-On-Chip totally integrated inside the car tyre, with the aim to interchange real time data with the car central unit. Such system is intrinsically self-biased (a vibration-based scavenger device is used), so that a very low power budget is available for the analog front-end (<100μW). Constant-charge capacitance-to-voltage conversion has been used for readout input acceleration sensing, that allows to reduce power and circuital complexity. At the same time large Signal-To-Noise-Ratio (>75dB over 1Hz÷4kHz bandwidth) has been obtained by a simple in-band noise filtering, while maintaining pass-band frequency response for the acceleration readout input signal. A prototype of the accelerometer analog front-end has been designed in CMOS 0.13μm technology node. The overall readout power consumption is 34μW, from a single 1.2V supply voltage. © 2013 IEEE.
DE MATTEIS, M., Vergine, T., Sabatini, M., Baschirotto, A. (2013). A 34 µW 75dB-dynamic-range CMOS analog front-end for intelligent tyre sensor network. In Proceedings of 2013 International Conference on IC Design & Technology (pp.163-166) [10.1109/ICICDT.2013.6563327].
A 34 µW 75dB-dynamic-range CMOS analog front-end for intelligent tyre sensor network
DE MATTEIS, MARCELLO;BASCHIROTTO, ANDREA
2013
Abstract
A high performance analog front-end for intelligent tyre MEMS accelerometer sensor is presented in this paper. The analog front-end is part of a bigger System-On-Chip totally integrated inside the car tyre, with the aim to interchange real time data with the car central unit. Such system is intrinsically self-biased (a vibration-based scavenger device is used), so that a very low power budget is available for the analog front-end (<100μW). Constant-charge capacitance-to-voltage conversion has been used for readout input acceleration sensing, that allows to reduce power and circuital complexity. At the same time large Signal-To-Noise-Ratio (>75dB over 1Hz÷4kHz bandwidth) has been obtained by a simple in-band noise filtering, while maintaining pass-band frequency response for the acceleration readout input signal. A prototype of the accelerometer analog front-end has been designed in CMOS 0.13μm technology node. The overall readout power consumption is 34μW, from a single 1.2V supply voltage. © 2013 IEEE.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
