DocumentCode :
88353
Title :
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
Volume :
49
Issue :
7
fYear :
2014
fDate :
Jul-14
Firstpage :
1506
Lastpage :
1513
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 precomputed through a least-square optimization problem. A calibration technique is introduced to achieve subnanosecond 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 :
calibration; condition monitoring; distortion; least squares approximations; microprocessor chips; piezoelectric transducers; pulse width modulation; structural engineering computing; timing; BCD process; PWM; active structural health monitoring; calibration technique; continuous-wave signal; four-channel piezo driver chip; least-square optimization problem; piezoelectric transducer; proof-of-concept IC; pulse-width modulation; signal distortion; subnanosecond timing accuracy; Calibration; Clocks; Integrated circuits; Monitoring; Pulse width modulation; Switches; Timing; BCD; calibration; class-D; piezoelectric transducer; pulse-width modulation (PWM); structural health monitoring (SHM); ultrasound;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2014.2315615
Filename :
6803097
Link To Document :
