Title :
Adequate SC model of op-amp with finite DC gain and bandwidth suitable for two-op-amp SC biquad analysis
Author :
Georgiev, Vjaceslav ; Stantchev, K.
Author_Institution :
Chr. Botev Campus, Higher Institute of Electrical & Mechanical Engineering, Sofia, Bulgaria
Abstract :
An adequate model of a nonideal op-amp operating in a two-op-amp SC biquad is derived. The model leads to an equivalent SC circuit containing ideal components. Substitution of any op-amp in an SC biquad by its equivalent SC circuit allows the exact frequency response of the biquad to be found easily, taking into account the finite DC gain and bandwidth of op-amps.
Keywords :
network analysis; operational amplifiers; switched capacitor filters; bandwidth; biquad analysis; equivalent circuits; finite DC gain; nonideal op-amp; two-op-amp switched-capacitor biquadratic filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860681
