High speed, low voltage swing receiver for mixed supply voltage interfaces

Abstract From the Canadian patent

A translation circuit for mixed logic voltage signals is comprised of a first pair of self-biasing common-mode level shifters for receiving positive and negative polarity input signals respectively of a balanced input signal each level shifter having a control input for receiving a ratio control signal and having first level shifter nodes for providing the same polarity output signals a second pair of self-biasing common-mode level shifters each connected in parallel with a corresponding variable ratio level shifter the second pair of level shifters having fixed level shift ratios a circuit connected to level shifter nodes of the second pair of level shifters for providing and storing a …