用于结构健康监测的可编程CMOS收发器
A Programmable CMOS Transceiver for Structural Health Monitoring
摘要：
我们描述了一种用于主动结构健康监测（SHM）的高集成度CMOS收发器。该芯片驱动压电换能器，并且还感测由同一换能器或另一换能器接收的超声波。该发射器采用整数N频率合成器和脉宽调制（PWM）技术，可生成低失真、带宽受限的波形，最高可达12.7 Vpp，中心频率为0.1-2.75 MHz。该集成的偏移消除全差分接收机具有可编程的增益和带宽，并使用正交解调来提取接收波形的幅度和相位以用于进一步的信号处理。该收发器是在0.5 μ m CMOS工艺制造的，并已使用（2D）损伤局部化的SHM测试台进行了验证。
英文摘要：
We describe a highly-integrated CMOS transceiver for active structural health monitoring (SHM). The chip actuates piezoelectric transducers and also senses ultrasound waves received by the same or another transducer. The transmitter uses an integer-N frequency synthesizer and pulse-width modulation (PWM) to generate low-distortion, band-limited waveforms up to 12.7 Vpp with center frequency from 0.1-2.75 MHz. The integrated offset-canceling fully-differential receiver has programmable gain and bandwidth, and uses quadrature demodulation to extract both amplitude and phase of the received waveforms for further signal processing. The transceiver was fabricated in a 0.5 um CMOS process and has been validated using (2D) damage localization on an SHM test bed.
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