Voltage feedback op-amp
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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Author of the text: Ed. P.A. Laplante Boca Raton: CRC Press LLC, 2000
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