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Circuits Signal Gain & Filter Gain Blocks
Circuits Sensor Interface & Bias Strain, Displacement & Accleration Sensors LVDT Interface
Circuits Signal Conditioning Operational Amplifiers (Op Amps) Low Noise Amplifiers
Circuits Signal Conditioning Operational Amplifiers (Op Amps) Low Bias Current Amplifiers

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Low Noise AC Difference Amplifier

View Full Size Image View Original Datasheet Low Noise AC Difference Amplifier

Piezoelectric and LVDT (Linear Variable Differential Transformer) sensors provide differential ac output signals. In addition to a standard difference amplifier a secend amplifier can be used as a dc servo amplifier to force an output dc bias potential in single supply applications. This difference amplifier is dc coupled but acts as a high pass network for ac signals with a lower corner frequency set by R5 and C3 of the dc servo amplifier.



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