Encoded differential balanced pam-4 driver structure

Abstract

A driver circuit has a logic circuit and a driver subcircuit. The driver subcircuit includes pullup transistors coupled between an output of the driver circuit and a first power rail and pulldown transistors coupled between the output of the driver circuit and a second power rail. The logic circuit includes combinational logic and is configured to turn on a predefined number of transistors during each data transmission interval. The duration of the data transmission interval is configured for an associated data communication channel. The transistors that are turned on may be selected during each data transmission interval based on a value of multibit data to be encoded in signaling state of the data communication channel. The logic circuit may be further configured to turn off transistors in the plurality of transistors that are not selected from the plurality of transistors based on the value of multibit data to be encoded.

Dependencies are inferred from the claim text.