A new level up shifter for HVICs with high noise tolerance

In this paper, a new level up shifter with high dV/dt and negative transient voltage noise immunities is presented. The proposed level up shifter achieves high noise immunity without an increase in the delay time of high-voltage ICs (HVICs). A fabricated 1200 V-class HVIC adopting the proposed level up shifter on a p-type substrate indicates a stable operation under the conditions of dV/dt noise over 50 kV/μs and negative transient voltage noise of -150 V. And we have confirmed the good performances of a 3-phase inverter driven by the fabricated HVIC.