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Definition of "voltage feedback op-amp" |
an op-amp in which the output voltage is controlled by the differential input voltage multiplied by the open-loop gain. A voltage feedback op-amp has very high input resistance (the current in either input is ideally negligibly small), low output resistance, and large open loop gain. Ideally, the bandwidth would be infinite; in practice, the finite bandwidth leads to a gain– bandwidth tradeoff in the closed loop performance of amplifiers using voltage feedback op-amps. Thus increasing the closed-loop gain causes a proportional decrease in the closed-loop bandwidth. |
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