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A. Chang, D. Fang, “A Two-Stage Telescopic Amplifier,” EE240 Term Project Report.

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Article

High Gain, Two-Stage, Fully Differential Audio Amplifier with 0.18μm CMOS Technology

1Faculty of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

2Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology, Tehran, Iran


American Journal of Electrical and Electronic Engineering. 2014, Vol. 2 No. 1, 6-10
DOI: 10.12691/ajeee-2-1-2
Copyright © 2014 Science and Education Publishing

Cite this paper:
Siavash Heydarzadeh, Ramezan Ali Sadeghzadeh. High Gain, Two-Stage, Fully Differential Audio Amplifier with 0.18μm CMOS Technology. American Journal of Electrical and Electronic Engineering. 2014; 2(1):6-10. doi: 10.12691/ajeee-2-1-2.

Correspondence to: Siavash  Heydarzadeh, Faculty of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. Email:

Abstract

The two-stage, fully differential audio amplifier with 0.18μm CMOS technology and TSMC process is proposed. Telescopic amplifier created stage one and common emitter structure used to provide high gain in stage two. The amplifier has a ±1.2V differential output swing and a gain greater than 127dB while consuming power less than 10mW from 1.8V supply voltage. The step response of the audio amplifier is about 0.04us and the gain-bandwidth of the circuit is near 1.1GHz. Hspice software used to produce simulation results.

Keywords