Designing and Implementing a Fully Differential Amplifier Using Current Conveyor of Third Generation
The emerging current mode devices are being familiar because of their absolute linearity and larger constant bandwidth as compared to the presently available voltage mode devices. This paper emphasizes the designing of a two-stage differential amplifier o
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Abstract The emerging current mode devices are being familiar because of their absolute linearity and larger constant bandwidth as compared to the presently available voltage mode devices. This paper emphasizes the designing of a two-stage differential amplifier of which the high gain stage constitutes a current mirror converting the differential current wisely to an output current which is single ended. The advantage of having higher output impedances in filter with active current mode elements can facilitate easier cascading of additional filters. These cascading on outputs of active devices can indeed improve filter responses to a greater extend which is not possible while using passive elements. The idea of designing a differential amplifier using active current conveyor blocks is pronounced widely because of their low component count, lower output impedances, higher input impedances, higher bandwidth, gain, and accuracy. Moreover, this differential amplifier with current mode devices exhibits greater reduced voltage excursion in sensitive nodes, lesser power usage, better accuracy and bandwidths, lower harmonic distortions, and excellent phase matching output gains. The simulations here are carried out using Cadence/PSpice. Keywords Analog signal processing · Current conveyors · Voltage and current source · Amplifier · CMOS device
P. Gupta (B) Departtment of ECE, KIIT Bhubaneshwar, Bhubaneshwar, India e-mail: [email protected] R. K. Ranjan Department of ECE, IIT-ISM Dhanbad, Dhanbad, India V. K. Verma ISRO Bangalore, Bangalore, India © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021 V. Nath and J. K. Mandal (eds.), Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems, Lecture Notes in Electrical Engineering 673, https://doi.org/10.1007/978-981-15-5546-6_62
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1 Introduction The current mode devices have paved its way after the undoubted rule of voltage mode circuits for more than four decades in designing and innovation of linear and nonlinear circuits. Potential advantages of simpler circuitry, higher slew rates, inherently wider bandwidths, and lower power consumptions have made the current mode circuits to receive a considerable attention [1–3]. The operational transconductance amplifier, the four-terminal floating nullor [4], and the current feedback operational amplifier are popular realization of current mode devices employing current conveyors. Moreover, the enhancements in analog circuit and systems are due to the improving quality of the active elements. Recent years have shown tremendous increase in the growth of electronically controllable active elements. Signal processing applications have also found many advantages [3, 5–8]. The current mode devices also exhibit single-parameter control of input resistances, voltage gains [9, 10], transconductance, and trans-resistance. A fully differential amplifier is basically a balanced output difference
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