Abstract
A new active building block for analog signal processing, namely, differential difference current conveyor transconductance amplifier (DDCCTA), is presented, and performance is checked through PSPICE simulations which show the usability of the proposed element is up to 201 MHz. The proposed block is implemented using 0.25 μm TSMC CMOS technology. Some of the applications are presented using the proposed DDCCTA, namely, a voltage mode multifunction filter, a current mode universal filter, an oscillator, current and voltage amplifiers, and grounded inductor simulator. The feasibility of DDCCTA and its applications is confirmed via PSPICE simulations.
Highlights
The analog integrated circuit design in current mode is receiving increased attention due to some potential performance features like wide bandwidth, less circuit complexity, wide dynamic range, low power consumption, and high operating speed [1]
Some new analog building blocks, such as current conveyor transconductance amplifier (CCTA) [9, 10], current controlled current conveyor transconductance amplifier (CCCCTA) [11], current difference transconductance amplifier (CDTA) [12], current controlled current difference transconductance amplifier (CCCDTA) [13], differen tial voltage current conveyor transconductance amplifier (DVCCTA) [14], and differential voltage current controlled conveyor transconductance amplifier (DVCCCTA) [15], are reported in the literature. These may be constructed by cascading of current mode building blocks with transconductance amplifier (TA) analog building blocks in monolithic chip for compact implementation of signal processing circuits and systems
It is well known that differential difference current conveyor (DDCC) has some advantages [7, 16, 17] specially for applications demanding differential and floating inputs, over CCII or CCCII owing to three high input impedance terminals for DDCC compared to one high input impedance terminal for CCII or CCCII
Summary
The analog integrated circuit design in current mode is receiving increased attention due to some potential performance features like wide bandwidth, less circuit complexity, wide dynamic range, low power consumption, and high operating speed [1]. Some new analog building blocks, such as current conveyor transconductance amplifier (CCTA) [9, 10], current controlled current conveyor transconductance amplifier (CCCCTA) [11], current difference transconductance amplifier (CDTA) [12], current controlled current difference transconductance amplifier (CCCDTA) [13], differen tial voltage current conveyor transconductance amplifier (DVCCTA) [14], and differential voltage current controlled conveyor transconductance amplifier (DVCCCTA) [15], are reported in the literature These may be constructed by cascading of current mode building blocks with transconductance amplifier (TA) analog building blocks in monolithic chip for compact implementation of signal processing circuits and systems.
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