TY - JOUR
TI - Reduction of operational amplifiers finite gain effects in switched-capacitor biquads
AU - Radev Nikolay
AU - Ivanov Kantcho
JN - Serbian Journal of Electrical Engineering
PY - 2005
VL - 2
IS - 1
SP - 29
EP - 41
PT- Article
AB- A combined approach for reducing the errors in the pole frequency f p, the pole Q - factor Qp and the magnitude at the pole frequency Hp, of switched capacitor biquads is presented. First, the conventional integrators in the biquads are replaced with gain-and offset-compensated integrators. Next, the errors Δ ƒp / ƒp, Δ Qp / Qp and Δ Hp / Hp are minimized by modifying three capacitances: two feedback capacitances and feed forward capacitance. The effectiveness of this approach is demonstrated by designing a band pass biquad.