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

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4 Author(s)
Yang Guo ; Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA ; Aquino, C. ; Zhang, D. ; Murmann, B.

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.

Published in:

ESSCIRC (ESSCIRC), 2013 Proceedings of the

Date of Conference:

16-20 Sept. 2013