Comments on "Two-Amplifier Active-RC Biquads with minimized Dependence on Op-Amp Parameters

This paper presents a design of Deliyannis and Friend's biquad using one of Mikhael and Nessim's composite amplifiers. This design has half the
Q
and
\omega_0
sensitivities of Schaumann's design[1] using the same biquad and composite amplifier. The parasitic stability problem is discussed and experimental results are given.