A heat dissipation unit is provided. When a character string to be synthesized is input with the task specified through, for example, a game system, a speech synthesizing process is performed using the word dictionary, the prosody dictionary, and the waveform dictionary corresponding to the specified task. In some embodiments, the wireless communication device comprises a first reconfigurable processing engine for configuration by a processing unit to perform a plurality of baseband processing operations on baseband samples. For example, the encapsulant layer may be formed from a thermoset resin that is capable of providing the capacitor element with mechanical stability. The circuit is configured so that the switch limits the charging current to a predetermined current level, or does not allow the charging current to flow until the output voltage of the power supply reaches a predetermined voltage level.