Importance

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Abstract

Voltage level shifters are devices that resolve mixed voltage incompatibility between different parts of a system that operate in multiple voltage domains. Voltage level shifters are typically also an important circuit component and are used e.g. in between a core circuit and an I/O (input/output) circuit. However, a voltage level shifter, when it switches between two levels, may generate voltage undershoots at intermediate internal nodes by capacitive coupling. These voltage undershoots cause an increased crosscurrent at the voltage level shifter which increases the overall power consumption and an increased delay in propagating the signals (i.e. voltage level shifters may be relatively slow in switching).

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