文件名称:slaa136a.pdf
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The devices used to transmit and receive the ultrasonic sound waves in this application are
40-kHz ceramic ultrasonic transducers. The MSP430 drives the transmitter transducer with a
12-cycle burst of 40-kHz square-wave signal derived from the crystal oscillator, and the receiver
transducer receives the echo.
40-kHz ceramic ultrasonic transducers. The MSP430 drives the transmitter transducer with a
12-cycle burst of 40-kHz square-wave signal derived from the crystal oscillator, and the receiver
transducer receives the echo.
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