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iqjump123
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Circuit Design for a "fractional"-amplifier
Hello all,
I am right now in the process of designing a simple device that will help me measure the voltage response of a piezoelectric element attached to a specimen after it has been hit with a projectile. The obvious issue is that the amount of voltage picked up, although short in duration, will be very high (~300V), and high in frequency values. I wanted to build an amplifier circuit that will take the voltage detected by the piezo element and decrease it down (while keeping the signal quality) to a +/- 5V signal. In addition, it would need to have a high frequency response, up to about 100kHz.
What I was thinking of doing was to use a charge amplifier circuit shown as
http://www.mmf.de/instrumentation.htm"
One issue that I am envisioning is the main reason to build a charge amplifier is to detect the small amount of charge coming from a piezo element and amplifying it, NOT to actually decrease it, and therefore choosing the right component that will give a high frequency response AND can exhibit fractional gain can be tough.
would it be just best to hook the system up to a divider circuit and then amplify that signal through a typical amplifier?
Thanks for your help in advance.
iqjump123
Hello all,
I am right now in the process of designing a simple device that will help me measure the voltage response of a piezoelectric element attached to a specimen after it has been hit with a projectile. The obvious issue is that the amount of voltage picked up, although short in duration, will be very high (~300V), and high in frequency values. I wanted to build an amplifier circuit that will take the voltage detected by the piezo element and decrease it down (while keeping the signal quality) to a +/- 5V signal. In addition, it would need to have a high frequency response, up to about 100kHz.
What I was thinking of doing was to use a charge amplifier circuit shown as
http://www.mmf.de/instrumentation.htm"
One issue that I am envisioning is the main reason to build a charge amplifier is to detect the small amount of charge coming from a piezo element and amplifying it, NOT to actually decrease it, and therefore choosing the right component that will give a high frequency response AND can exhibit fractional gain can be tough.
would it be just best to hook the system up to a divider circuit and then amplify that signal through a typical amplifier?
Thanks for your help in advance.
iqjump123
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