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Choosing an op-amp for your project


Just say no to LM741 and LM324 / LM358.

That said, some of the latest op-amp designs — such as the aforementioned OPA2323 — use a built-in DC-DC converter(a charge pump) to generate a higher internal reference voltage and eliminate the need for this architecture. In practice, in the specific case of a conventional voltage-to-voltage circuit with two feedback resistors, the maximum attainable signal gain is (mostly) equal to f GBP divided by the input frequency. In transimpedance (current-to-voltage) circuits, noise amplification is inconsequential near DC, but eventually peaks at higher frequencies because the input capacitance forms a voltage divider with the feedback resistor.

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