Compact Modeling of Low Frequency Noise and Thermal Noise in Junction Field Effect Transistors

Abstract

This paper presents a novel charge-based approach to modeling bias-dependent noise in junction field-effect transistors (JFETs). Low frequency noise as well as thermal noise aspects are modeled within the recent charge-based model of the double-gate (DG) JFET. For low frequency noise, mobility fluctuations according to the Hooge model is addressed. Thermal noise is expressed within the charge-based modeling approach. The models are validated with respect to TCAD simulations and show correct dependence over a range of gate and drain bias. A custom setup for low frequency noise measurement of JFETs is described. Noise measurements of n-JFETs are discussed, and the compact model is compared with the measurement.