US Patent 10128965 Coupled inverter with auto-calibration

A device including an input configured to receive an input signal in an operational mode and to receive a reference voltage in a calibration mode is provided. The device includes a capacitor to store a reference charge based on the reference voltage and an input inverter to capture a transition of the input signal. The input inverter is coupled in series with the capacitor so that the transition of the input signal occurs when a voltage of the input signal crosses the reference voltage. The device includes an output inverter coupled in series with the input inverter to provide an output signal having a parity of the input signal. A system including the above device, and a method for calibrating the above device, are also provided.