Title :
A low-power interface circuit for piezoresistive transducers
Author :
Donida, Achille ; Barrettino, Diego
Author_Institution :
Dept. of Technol. & Innovation (DTI), Univ. of Appl. Sci. of Southern Switzerland, Manno, Switzerland
Abstract :
This paper presents the design and development of a low-power interface circuit for piezoresistive transducers. This circuit combines the chopping technique with the correlated double sampling (CDS) technique in order to eliminate both the amplifier offset and the chopper ripple at the sampling frequency. In addition, programmable current sources compensate for the transducer offset and the low frequency components coming from environmental conditions thus allowing the readout of very weak input signals with high resolution (0.45μV) at a total power consumption of 200 μW.
Keywords :
choppers (circuits); piezoelectric transducers; piezoresistive devices; power consumption; sampling methods; amplifier offset; chopper ripple; chopping technique; correlated double sampling technique; low-power interface circuit; piezoresistive transducers; power 200 muW; power consumption; programmable current source; sampling frequency; voltage 0.45 muV; CMOS integrated circuits; Choppers (circuits); Frequency modulation; Noise; Piezoresistance; Resistors; Transducers;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2015 IEEE International
Conference_Location :
Pisa
DOI :
10.1109/I2MTC.2015.7151549
