Electronically tunable first-order OTA-capacitor filter sections
Iqbal Ahmad Khan, Muslim T. Ahmed · International Journal of Electronics · 1986
Electronically controlled first-order building blocks, using only operational transconductance amplifiers and capacitors, are realized and studied. The circuits exhibit convenient control of circuit parameters with the help of external voltage or current control. Each circuit uses a low component count and has low sensitivity performance. The basic blocks can be used for the realization of higher-order electronically tunable filters.