The use of a variety of devices to render multimedia content is on the increase. The sigma-delta modulator utilizes Micro Electro Mechanical System technology coupled with on-chip LC networks. The line modulator contains a Darlington pair which reduces the amount of current drawn by the line modulator, allowing the sense resistor to sense a majority of the system current. , with one or more o-ring seals, in a housing to provide a filter assembly capable of filtering fluid under relatively high pressure. A microfluidic fuel cell system fabricated using this process is also described. The mediating server receives the first transmission information and transmits, to a second information processing equipment, the second transmission information which is the information containing the relay server identification information contained in the first transmission information.