An operational-amplifier filter circuit is presented, which can realize a highQat high frequencies, with low sensitivity to both the passive circuit components and the operational-amplifier gain-bandwidth products. Unlike most of the reported high-Qhigh-frequency circuits, which use positive feedback, this is a negative-feedback circuit and is based on the principle of the two-integrator loop.
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M. Anji Reddy (1976) studied this question.
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