G. Prabhakaran ¹, V. Kannan ²

Affiliations
1 Faculty of Electronics and Communication, Sathyabama University, Chennai-600119, Tamil Nadu, IN
2 Jeppiaar Institute of Technology, Sriperumbudur, Kanchipuram District, Kunnam-631604, Tamil Nadu, IN

Abstract

This paper investigates on the design of two stage Operational Amplifier (Op-Amp) with NMOS input at differential stage. This low power Op-Amp designed with Amorphous Silicon Thin Film Transistor (a-Si TFT) and MOS transistor. It is observed that the newly designed TFT Op-AMP operates in low voltage at 3V DC, with high gain, high output impedance and high phase margin and moderate power dissipation. A detailed design procedure is carried-out to design the proposed Op-Amp. HSPICE Circuit Simulator is used for simulation. Obtained results are compared with CMOS Op-Amp which uses the same circuit and design procedure. The output behavior of TFT Op-Amp is also compared with the existing work showing good agreement.

Keywords

Amorphous Silicon, CMOS, High Stability, Low Power, Operational Amplifier, Thin Film Transistor

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