A Novel Design of Low-Voltage VDIBA and Filter Application

In this study, a low-voltage low-power design of previously introduced analog signal processing element called as Voltage Differencing Inverting Buffered Amplifier (VDIBA) is presented. Level shifter current mirrors are used in the circuit design in order to accomplish the low-voltage low-power operation. The configuration operates only with ±0.4 V supply voltages and consumes power 569 μW at the bias current 50 μA. Also, low-voltage transconductor which has highly linear gm is executed with the use of bulk-driven quasi-floating gate (BD-QFG) and source degeneration techniques. The simulations of the introduced circuit have been performed with 0.18 μm TSMC CMOS technology by SPICE. The theoretical approaches have been confirmed by the simulation results

A Novel Active Element: Fully Differential Voltage Differencing Current Controlled Current Conveyor (FD-VDCCC) and Filter Applications

In this study, a novel active signal processing block called Fully Differential Voltage Differencing Current Controlled Current Conveyor (FD-VDCCC) is proposed. The input and the output stages of FD-VDCCC consist of a fully differential operational transconductance amplifier and a current controlled differential voltage current conveyor, respectively. The FD-VDCCC can be adjusted by bias currents. The proposed active element has not only various differential voltage and current input terminals but also various voltage and current output terminals. Hence, the proposed active element complies with current mode or mixed mode circuit designs. In the study, in order to demonstrate the functionality of the considered structure, FD-VDCCC based current controlled universal filter is proposed. The study also contains the CMOS realization of FD-VDCCC and SPICE simulation results obtained with 180 nm TSMC CMOS technology parameters for the proposed FD-VDCCC and universal filter structures