A digital intensive circuit for low-frequency noise monitoring in 28nm CMOS

A test monitor circuit for low-frequency noise characterization is demonstrated in 28nm CMOS technology. The circuit allows a fast evaluation of the low frequency noise performance of transistors, providing a digital output. The VCO-based quantizer used for analog to digital conversion is capable of converting signal of small amplitude, in the μV range. A good agreement between the results obtained with the proposed circuit and standard measurements techniques is obtained.