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Tuesday, October 20, 2009

Simple Driving Capacitive Loads Circuit

This is a simple circuit design for capacitive load driver. This circuit is built by LF155. LF155 is an op amps that is feature low input bias and offset currents/low offset voltage and offset voltage drift, coupled with offset adjust which does not degrade drift or common-mode rejection. This is the figure of the circuit.


This figure in above is the circuit for drive capacitive loads. For make this circuit, we need resistor 5K if we used this op amps. This is due to a unique output stage design, these amplifiers have the ability to drive large capacitive loads and still maintain stability. CL(MAX) 0.01μF. This circuit has overshoot ≤ 20%. [Circuit source: National Semiconductor, Inc]

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