Notch frequency adjustable active filter using uniformly distributed RC line

The paper describes a new notch frequency adjustable type filter using a uniformly distributed RC line (URC) with three capacitive layers. The proposed circuit consists of one URC with three capacitive (C/sub 0/, C/sub 1/ and C/sub 2/) layers and a single gain amplifier. /spl alpha//sub 1/, /spl alpha//sub 2/ of the circuits are used to adjust the notch tunable frequency and K is used to control the minimum stop band loss. The structure reduces the amount of circuit complexity and is simple to use for filter applications. Finally, computer simulation results showed good agreement with theoretical values. Sensitivity analysis is also carried out.