Synthesis of a Biquadratic Transadmittance Filter

This paper focuses on a novel biquadratic filter using five kinds of current-mode active elements which are the current differencing buffered amplifier (CDBA), plus-type of differential difference current conveyor (DDCC+), current feedback amplifier (CFA) and plus-type and minus-type of second generation current conveyor (CCII±) to eliminate the redundant terminals. Furthermore it uses two capacitors and eight resistors. All capacitors and resistors in the circuit are grounded and suitable for integrated circuit implementation. The circuit of the proposed filter offers several advantages, such as high input and output impedances, low sensitivities to passive elements, and of use in controlling w0 and Q with the values of capacitors and resistors, respectively. An example is given. The active devices of the proposed circuit have been simulated by Hspice using 0.5μm CMOS technology.