A four-channel, ±36 V, 780 kHz piezo driver chip for structural health monitoring

Author

Yang Guo ; Aquino, Christopher ; Zhang, Dejing ; Murmann, Boris

Author_Institution

Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA

fYear

2013

fDate

16-20 Sept. 2013

Firstpage

85

Lastpage

88

Abstract

This paper describes a four-channel piezo driver chip for use in active structural health monitoring. Each channel can drive a piezoelectric transducer with a continuous wave signal of ±36 V and 780 kHz. The waveform is synthesized using filtered pulse width modulation (PWM), where the pulse transition times are pre-computed through a least square optimization problem. A calibration technique is introduced to achieve sub-nanosecond timing accuracy and -40.5 dB signal distortion. A 13 mm² proof-of-concept IC was fabricated in a 0.25 μm BCD process and evaluated within an application test bed.

Keywords

condition monitoring; least mean squares methods; optimisation; piezoelectric transducers; BCD process; IC; PWM; active structural health monitoring; calibration technique; continuous wave signal; filtered pulse width modulation; frequency 780 kHz; least square optimization; piezo driver chip; piezoelectric transducer; pulse transition times; signal distortion; size 0.25 micron; subnanosecond timing accuracy; Calibration; Distortion; Integrated circuits; Monitoring; Pulse width modulation; Timing; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC (ESSCIRC), 2013 Proceedings of the

Conference_Location

Bucharest

ISSN

1930-8833

Print_ISBN

978-1-4799-0643-7

Type

conf

DOI

10.1109/ESSCIRC.2013.6649078

Filename

6649078