Piezo charge amplifier gain
Background: A piezoelectric vibration sensor produces an output voltage proportional to the vibration force acting on it, and at the same frequency as the vibration. Because the voltage is small for small forces, it is connected to an op-amp circuit shown below.
Problem:
a) This op-amp is configured as a...
a. An inverting amplifier
b. A noninverting amplifier
c. A buffer
d. None of these standard configurations
b) Explain your answer.
c) The voltage gain of the opamp...
a. Is independent of frequency
b. Decreases at high frequencies
c. Increases at high frequencies
d) Explain your answer.
Piezo charge amplifier gain Background: A piezoelectric vibration sensor produces an output voltage proportional to the vibration force acting on it, and at the same frequency as the vibration. Because the voltage is small for small forces, it is connected to an op-amp circuit shown below. C2 H1 15pF Piezo Plates HH 30nF Vout Crystal 10mVpkl
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Problem: aThis op-amp is configured as a..
a.An inverting amplifier b.A noninverting amplifier c.A buffer
d.None of these standard configurations
b Explain your answer.
cThe voltage gain of the opamp... a.Is independent of frequency
b. Decreases at high frequencies
Increases at high frequencies
d Explain your answer.