The scenario
A piezo pickup for studio recording requires extremely high input impedance, low noise, and a balanced output to drive long cables to a mixing console.
What is in this drawing
Read the decisions behind it.
01
Non-inverting JFET-input op-amp stage for high impedance and low noise
02
Unity-gain inverter for phase-split balanced output
Piezo contact mics, acoustic instrument pickups, or any high-output-impedance transducer needing clean gain and balanced connectivity.
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