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Block Diagram of a Typical PI Piezo Amplifier/Position Servo Controller

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Piezo amplifiers without position servo control work according to the top branch of the diagram. Also, the slew rate adjustment, servo ON/OFF switch and overflow indicator are only found on position servo controllers. Note that the DC-Offset is added to the input voltage before it is amplified.

The diagram shows that the LVPZT Piezo amplifier input range can be varied with the DC-Offset potentiometer. This principle is also valid for HVPZT Piezo amplifiers, where the typical input range is 0 to +10 V and the output range is 0 to -1000 V. The DC-Offset potentiometer allows for a continuously variable input range between 0 V to +10 V and -10 V to 0 V.

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