A high DR multi-channel stage-shared hybrid front-end for integrated power electronics controller

This paper presents a 4-channel power electronics (PE) controller front-end interface with input signal conditioning and analog-to-digital (A/D) conversion functions for different power electronics system applications. The proposed front-end is composed of a 4-channel continuous-time (CT) and discrete-time (DT) hybrid sigma-delta modulator (H-EAM) embedding an input programmable-gain (PGA) in the first CT stage in order to enhance the input dynamic range (DR). The second shared DT stage is designed to utilize multiple-sampling technique with a shared single Op-Amp for low power consumption. This PE controller front-end chip is fabricated with 65 nm CMOS technology. Measurement results show a high dynamic range of 98.3 dB and 84.2 dB SNDR, while achieving a power consumption of 68 μW per channel and a FoMs of 172–179 dB due to the dynamic range boost.