![]() ![]() Different op-amp designs have different maximum values that they can achieve for the gain, but for the vast majority of applications, you get to choose the level of gain you want to apply to the input differential. Regardless of what you are amplifying, be it voltage, current, or power, dividing the output by the input will give you your overall gain. The value of amplification is called the gain and is often seen measured in decibels (dB). By looking at the difference between the two inputs, and using the +/- voltage supplies as max/min output values, the op-amp will output a voltage reference value that can be many times higher than the input. Op-amps are usually two-input, one-output devices, with additional pins for +/- voltage supplies. Some really good educational/instructional material is available here, under Chapter 5. ![]() I recommend you take the time at some point to read up on them though since they are so useful in so many applications. There won't be any heavy math involved, just some summarizing. If you could really care less about the theory behind op-amps or just don't want to read right now, skip this step. ![]()
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