Use of back gate bias to improve the performance of n- and p-type UTBB transistors-based self-cascode structures applied to current mirrors

Abstract

This paper aims at demonstrating, for the first time, the use of back bias to improve the analog performance of current mirrors composed by self-cascode structures with 25 nm-long n- and p-type UTBB SOI MOSFETs. The use of back gate bias has shown to enhance the intrinsic gain of p-type devices by about 7 dB, making it higher than the one from a single device with equivalent channel length whereas the mirroring precision has shown to be improved by 20 % with respect to single devices.