In this paper high-voltage MOS transistors structures fabricated using a standard CMOS technology and a special design technique are presented. The design, characterization, and modeling of n-MOS, with the breakdown voltage of 50 V, and p-MOS, with the breakdown voltage of 130 V, fabricated using a standard 3 micrometers CMOS process are discussed. In addition, the possibility of high-voltage buffer circuit realization which is composed of n-MOS and p-MOS transistors, operating with the supply system USS equals 0, UDD equals 5 V, UE equals - 40 V, self-isolated from low-voltage components is demonstrated.
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