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Fixator-Norator Pair Based Design of Feedback Networks for Analog Amplifier Circuits

Department of Electronics, School of Technology and Applied Sciences, Mahatma Gandhi University Regional Centre, Edappally, Kochi 682024, Kerala, India

E-mail Address: rohithkrishnan@staskochi.org

Corresponding author.

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S. Krishnakumar

Department of Electronics, School of Technology and Applied Sciences, Mahatma Gandhi University Regional Centre, Edappally, Kochi 682024, Kerala, India

E-mail Address: drskrishnakumar@staskochi.org

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, and

Reza Hashemian

Department of Electrical Engineering, Northern Illinois University, DeKalb, IL 60115, US

E-mail Address: reza@niu.edu

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https://doi.org/10.1142/S0218126618500500Cited by:1 (Source: Crossref)

Abstract

Feedback is an integral part of many analog circuits. This paper presents a method for the design of feedback networks for analog amplifiers based on Fixator–Norator Pair (FNP). The design process for required transfer function includes inserting proper FNPs to the equivalent small signal model of the target circuit, with norators lying along the feedback path, and helps to design the feedback network components. Care must be taken to ensure that the added feedback should not alter the original DC biasing of the circuit. A number of examples are worked out in this paper using the proposed method and the results are verified. The FNP approach gives a one-step solution for the design problems which otherwise require tedious analysis and calculations. Although the scope of this paper is limited to design of feedback for amplifiers, a skillful designer can extend the proposed method to other areas of analog circuits.

This paper was recommended by Regional Editor Emre Salman.

Keywords:

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