Abstract
The R-C active filters investigated use operational amplifiers as the active element and are capable of realizing second-order network functions with no finite transmission zeros. One of the networks uses positive feedback; another uses negative feedback (from an amplifier of nominally infinite gain); two use both positive and negative feedback (from a paraphase amplifier of nominally infinite gain); the fifth uses a combination of three amplifiers all of nominally infinite gain; the sixth uses a four-amplifier realization of a gyrator, again all of nominally infinite gain.Expressions are given for the sensitivity of the (Q-factor and frequency of location of the ‘peak’ to variations in the ratios of the passive elements and to gain. Also the effects on the Q-factor of finite gain and phase shift in the amplifier are observed.The operational amplifiers are assumed to be of infinite input impedance and zero output impedance and to have a gain which is approximated to a first-order lag.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
