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.
Highlights
Active RC Integrator is an extremely versatile circuit element that is employed in development and synthesis of numerous analog signal processing as well as generation circuits that include active filters, quadrature oscillators, waveform generators and many more
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
The presented circuit is verifying by simulating it by employing CMOS CDDITA with ±3 V DC supply voltage
Summary
Active RC Integrator is an extremely versatile circuit element that is employed in development and synthesis of numerous analog signal processing as well as generation circuits that include active filters, quadrature oscillators, waveform generators and many more. Various voltage or current mode integrator circuits based on traditional and modern active components has been proposed in literature. Some integrator circuits employing modern active elements like current differential buffered amplifier (CDBA) [8], multiplication mode current conveyor (MMCC) [9], current controlled current differential buffered amplifier (CCCDBA) [10], differential difference current conveyor (DDCC) [11], current differential transconductance amplifier (CDTA) [12], current follower transconductance amplifier (CFTA) [13], CCCCTA [14] and current feedback operational amplifier (CFOA). The goal of this manuscript is to remove disadvantages mentioned above, it possess following advantages: 1) Only one CDDITA is used; 2) Just one capacitor is used; 3) Realization is purely free of resistor; 4) Grounded capacitor used, reduces chip area; 5) Gain is electronically tunable; 6) Better performance in non ideal case; 7) Current output signal at high impedance port is available. The applications of CDDITA in analog signal processing/signal generation have been proposed in [17] [18]
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