Patent ID: 9337840
Filing Date: 2016-05-10
CPC Classification: H03K

Claim Text:
1. A level shifter for transitioning a signal between a lower-voltage domain and a higher-voltage domain, said level shifter comprising: an input node configured to receive an input signal in a lower-voltage domain; an output node configured to output a higher-voltage representation of the input signal in a higher-voltage domain; a lower-voltage control circuit configured to selectively disable a lower-voltage supply from supplying a lower-voltage to a boundary node arranged at a boundary between the lower-voltage domain and the higher-voltage domain in response to a high-level input signal; and a higher-voltage control circuit configured to selectively raise a voltage level at the boundary node in response to the high-level input signal, wherein the higher-voltage control circuit comprises a boost capacitor configured to boost the voltage level at the boundary node in response to a high-level input signal, and wherein the boost capacitor is connected between the output node and the boundary node.