New Current Mode Lossy Integrator Employing CDDITA

Abstract

This work presents a novel current-mode (CM) lossless integrator that uses one current differencing differential input transconductance amplifier (CDDITA) and one grounded capacitor. The configuration based on single active element has several advantages from the aspect of monolithic integration, few are: reduced power consumption, chip miniaturization. Employment of grounded capacitor is also beneficial for monolithic integration. Specifying some of the key features of integrator proposed are: 1) purely resistorless, 2) electronically tunable, 3) current output available at the port having high impedance, and 4) excellent performance under non-ideal conditions. So, a resister-less current mode lossy integrator with electronic control employing single CDDITA has been proposed in this paper. The verification of workability of the proposed current mode integrator is well explained by the help of SPICE simulations using TSMC CMOS 0.18 µm technology node.

Reconfigurable of current-mode differentiator and integrator based-on current conveyor transconductance amplifiers

“…The proposed circuits in [13], [20], [23], [25], [30], [32] ISSN: 2088-8708  are designed for electronic tuning by using a multiplier circuit, but two types of the different active elements have been used. The differentiators and integrators of [14], [21], [22], [28], [40] can be electronically tuned the time constant although they are still sensitive to the temperature. Furthermore, some proposed circuits in [11], [12], [15], [17]- [19], [22], [25], [30], [31], [37] use the floating capacitor that is not suitable for the integrated circuit fabrication.…”

“…Furthermore, some proposed circuits in [11], [12], [15], [17]- [19], [22], [25], [30], [31], [37] use the floating capacitor that is not suitable for the integrated circuit fabrication. The configurations in [13], [14], [23], [28], [34], [40] are operated in the integrator while those in [15], [27] [31], [38], [39] are served to operated in the differentiator. The comparison of the differentiator and integrator circuits can be shown in Table 1.…”