In this paper, a differential to single-ended DC-coupled compact and power-efficient lumped driver for single-ended optical modulators using the IHP 250 nm SiGe BiCMOS SG25H5 technology, featuring ft/fmax of 220/290 GHz, has been analyzed and reported. The amplifier is composed of a differential to single-ended common-emitter variable gain stage, a fixed gain common-emitter stage and a cascode amplifier. Emitter followers have been used between the stages for DC leveling purposes. Peaking inductors for both input and output stages have been used to shape the frequency response in different frequency ranges, while degeneration resistors have been employed for improving the linearity of the circuit.