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How can i make a voltage or charge amplifier for a piezoelectric sensor ? what do i need to know ?


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iceng3 years ago
You need to understand a piezo has more output range then any op-amp.

To use a piezo always add a peak limit and the natural negative protection.

If you can not determine your high piezo output before-hand there
is the technical gain amplifier selection on the fly with its attendant
resolution losses.

A charge coulomb integrating amplifier collector can be useful.

Strain gauges are proper more reliable approach to instrumentation.

A
To work out the performance, you need to specify the load you are going to apply, in terms of microstrain.

It could be 200V.
Take a look for "charge amplifier circuits"
nobykobe (author)  steveastrouk3 years ago
thanks for the fast response
The data sheet you posted has a block diagram of the signal amp. All you need is an Op-amp, resistor and capacitor and your all set. According to the diagram in the data sheet anyway.

Here is some great information on Op-amps that should help you figure out what you need. 
http://www.talkingelectronics.com/projects/OP-AMP/OP-AMP-1.html
nobykobe (author)  mpilchfamily3 years ago
I want to know , how much voltage does the piezoelectric sensor generate so i can determine how to design the amplifier

Thanks