PPT Slide
Electronics
Simple homemade circuit
Built in a metal box to reduce noise (< 2mV)
Includes
Bias circuit: Vbias = 25.8 mV
I-V converter: Gain = 104 V/A
-9 V
21 k?
4.7 k?
39 ?
Vbias
OP 27
+9V
-9V
10 k? 1%
Digital
Oscilloscope
I
Piezo
Vcurrent
TIP
Substrate
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