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Current- Feedback Op Amp Applica
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Introduction No two high-speed application are the same – or at least it seems that way. Nonetheless， while every system has its particular requirements， many of the design techniques are common among different designs. This application note illustrates design techniques utilizing current-feedback op amps and the practical circuits where they are used. The circuits should work well with any Comlinear op amp if appropriate adjustments are made for different feedback resistance values.
Inverting Gain As with voltage-feedback op amps， the ratio of the feedback resistor to the gain-setting resistor determines the voltage gain in current-feedback op amp circuits. With current feedback， however， dynamic performance is largely independent of the voltage gain. （See application note AN300-1 for a technical discussion of current-feedback.） Also， the optimum feedback resistor value for a current-feedback op amp is indicated in the datasheet.
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