Selectivity improvement in a useful second-order active RC section†

1 September 1971

journal article
research article
Published by Taylor & Francis in International Journal of Electronics

Vol. 31 (3) , 243-248
https://doi.org/10.1080/00207217108938221

Abstract

A negative feedback circuit using one operational amplifier has its Q factor enhanced through the introduction of an additional voltage amplifier with positive finite gain in the feedback loop. The new network has two useful outputs. If a twin,T is connected in cascade with the network input terminals the overall circuit is suitable for the realization of biquadratics or third-order low-pass elliptic functions. The network sensitivity is very low.

Keywords

SELECTIVITY IMPROVEMENT
RC SECTION
ACTIVE RC
USEFUL SECOND
ORDER ACTIVE

This publication has 1 reference indexed in Scilit:

RC-Amplifier Resonators for Active Filters
IEEE Transactions on Circuit Theory, 1968