Design of CMOS Current Controlled Current Differencing Transconductance Amplifier and Its Applications

Abstract

This article presents a new current-mode building block for analogue signal processing, called as
Current Controlled Current Differencing Transconductance Amplifier (CCCDTA). Its parasitic
resistances at two current input ports can be controlled by an input bias current. Owing to working in
current-mode of all terminals, it is very suitable to use in a current-mode signal processing, which is
continually more popular than a voltage-mode one. The proposed element was realized in a CMOS
technology and was examined the performances through PSPICE simulations. They display usability
of the new active element, where the maximum bandwidth is up to 311MHz. The supply voltages can
be as low as ±1.5V and maximum power consumption is 1.82mW. The proposed CCCDTA performs
low-power consumption and tuning over a wide current range. In addition, examples as a currentmode
universal biquad filter and floating inductance simulator were included. They occupy only
single CCCDTA.