Measurements of the low-frequency noise in several types of AlSb/InAs HEMTs
are reported. The slope of the noise level with frequency is close to idea
l 1/f for some types, while others have significant generation-recombinatio
n components. The Hooge parameter, alpha (H), for all the devices is in the
range between 10(-3) and 10(-2) based on floating-gate measurements at low
drain voltage.