Nonlinear Noise Mechanisms in Active Devices: Additive Amplitude Noise and Phase Noise

TL;DR

This paper develops a theoretical framework for analyzing amplitude and phase noise in nonlinear active devices, enabling analytical calculations for complex nonlinear circuits and practical transistor stages.

Contribution

It introduces a novel analytical framework for noise analysis in nonlinear semiconductor devices, addressing both amplitude and phase noise.

Findings

Analytical formulas for noise in nonlinear RC circuits

Noise analysis of a common-emitter bipolar transistor

Framework handles nonlinearity and noise simultaneously

Abstract

In this report, we lay the foundation for amplitude noise and phase noise analysis in nonlinear devices. We build a theoretical framework that helps us to analyze extremely difficult problems which include both nonlinearity and noise of semiconductors. Using our proposed framework, we analytically calculate the amplitude noise and phase noise of nonlinear RC circuits in the presence of nonlinear capacitance and conductance. As a more practical example, we analyze the amplitude noise and phase noise of a common-emitter stage bipolar transistor.