Patent ID: 8253715

Claim:
An apparatus comprising: a trans-impedance amplifier configured to receive data currents, convert said data currents into voltages, and output said voltages as data voltages and clock voltages; and a comparator electrically coupled to said trans-impedance amplifier configured to change levels of said data and clock voltages applied from said trans-impedance amplifier and to output said level-changed voltages as data signals and a clock signal, wherein said trans-impedance amplifier comprises: a first data amplifier configured to receive a first data current and convert said first data current into a voltage to output a first data voltage; a second data amplifier configured to receive a second data current and convert said second data current into a voltage to output a second data voltage; and a clock amplifier configured to receive said first and second data currents and to convert said first and second data currents into a voltage to output a clock voltage.