Autors: Radev, N., Mastorakis, N., Mladenov, V. M.
Title: Minimization of operational amplifiers finite gain effects in switched-capacitor biquads
Keywords: Filters, gain-and offset-compensation, operational amplifier

Abstract: An combined approach for reducing the errors in the pole frequency fp, in the pole Q-factor Qp and in the amplitude at the pole frequency Hp of switched-capacitor biquads is presented. At first, the conventional integrators in the biquads are replaced by gain-and offset-compensated integrators. Subsequently, the errors ∆fp/fp, ∆Qp/Qp and ∆Hp/Hp are minimized by modifying three capacitances: the two integrating capacitances and an appropriately chosen capacitance. The effectiveness of this approach is demonstrated by designing a bandpass biquad.

References

    Issue

    WSEAS Transactions on Circuits and Systems, pp. 1130-1134, 2004, Greece, ISBN ISSN: 1109-2734

    Вид: статия в списание, публикация в реферирано издание, индексирана в Scopus