A new trans-impedance mode biquad filter employing single DVCCTA

Abstract EN

In this study a new topology realizing the biquad filtering functions based on only single DVCCTA as active element is proposed which consists of four grounded passive elements too and canonical in structure as it consists of two grounded capacitors.

By applying only the single current input signal at appropriate node, the proposed biquad realizes various types of four voltage filtering responses, simultaneously, each at different node of the circuit.

Thus, the proposed filter is behaving as current input voltage output circuit and hence, called transimpedance- mode (TIM) biquad filter.

Besides, it enjoys with reasonable low power consumption and low components sensitivities.

Moreover, the center pole frequency (0) can be independent tuned to quality factor (Q0) through biasing current control of active element.

Moreover, the PSPICE simulated results in 0.18ˇm CMOS technology are also shown in the study which can verify the validity of the circuit.