668 Piezoelectric Transducer Piezoelectric transducers (sensors) measure dynamic phenomena such as pressure and force. These phenomena cause
Question:
6–68 Piezoelectric Transducer Piezoelectric transducers (sensors) measure dynamic phenomena such as pressure and force. These phenomena cause stresses that “squeeze” a quantity of electric charge from piezoelectric material in the transducer (the term piezo means “squeeze”
in Greek). The amount of charge q t ð Þ is directly proportional to the measured variable xðtÞ, that is qðtÞ = αxðtÞ. Signal amplification is needed because the amount of charge produced is on the order of pC. Figure P6–68 shows an OP AMP charge amplifier that provides the necessary gain. First show that the OP AMP output is vOðtÞ = −KqðtÞ. Then select a value of C so that the charge amplifier gain is K = 5mV=pC.
Step by Step Answer:
The Analysis And Design Of Linear Circuits
ISBN: 9781119235385
8th Edition
Authors: Roland E. Thomas, Albert J. Rosa, Gregory J. Toussaint