Abstract
A number of authors have proposed the use of additional operational amplifiers (op amps) for compensating the detrimental effects of the frequency-dependent gains of the op amps already used in the circuit. The technique is known as active compensation. Among all such actively compensated circuits, two circuits have been derived from the single-amplifier biquad (SAB) of Deliyannis-Friend. These two circuits possess very low passive and active sensitivities. A comparison is made of their performances not only with respect to the active sensitivities but also from the point of requiring matched op amps and their stability. >
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