US Patent 11936353 Direct-switching h-bridge current-mode drivers

A current-mode transmitter amplifies a differential input signal to a differential, current-mode output signal. A split-input, current-mode-logic stage produces small, analog signals to limit switching currents and thus power consumption and power-supply noise. These small, analog signals are driven through a source-follower stage to reduce loading and shift the common-mode voltage to a desired level. A switched-current-source H-bridge driver combines differential outputs from the source-follower stage to provide an amplified differential output current. The output swing from the H-bridge driver is controlled by the voltage level from the source follower and derived from a replica-bias structure.