Patent ID: 8384431
Filing Date: 2013-02-26
Classification: H03K

Abstract:
1. A level shift circuit, comprising: a cross-coupled pull-up circuit operably coupled to a higher supply voltage in a range of about 3.3 to 5 volts, an output signal, and an inverted output signal; an input signal configured to transition between a ground and a lower supply voltage below 3.3 volts and down to 1.2 volts; an inverted input signal configured to transition in a direction opposite from the input signal and between the ground and the lower supply voltage; a first n-channel transistor with a gate operably coupled to the lower supply voltage, a drain operably coupled to the output signal, and a source operably coupled to the inverted input signal; and a second n-channel transistor with a gate operably coupled to the lower supply voltage, a drain operably coupled to the inverted output signal, and a source operably coupled to the input signal.