28 Apr '13, 10pm

Simulation shows how real op amps can drive capacitive loads via @EDNmagazine

Simulation shows how real op amps can drive capacitive loads via @EDNmagazine

While an ideal op amp has infinite gain, a real op amp has very high, but finite DC gain. It also has a pole at a fairly low frequency that causes the op amp’s gain to roll off, eventually reaching unity gain at some much higher frequency. This pole is referred to as the dominant pole. There are always more poles, all at frequencies higher than the unity-gain frequency in a well-designed op amp. For most practical purposes we can perform our analyses by considering only the first of these poles.

Full article: http://www.edn.com/design/analog/4412899/Simulation-shows...

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