A VCO driving circuit and a frequency synthesizer wherein the impedance viewed from a VCO control terminal is reduced to prevent the VCO phase noise characteristic from degrading. The case contains the capacitor element and is joined to a first electrode of the capacitor element at its inner bottom surface. This process includes forming a substantially uniform copper composition comprising a polysaccharide binder, water, and copper particles; molding the copper composition under conditions sufficient to form a solid molded intermediate; and sintering the solid molded intermediate at a sufficient temperature and for a sufficient time to form a heat sink. In this way, the heated air flowing through the central portion of the attachment creates a low-pressure zone on the inside surface of the portals, drawing ambient air through the portals into the interior of the hair dryer attachment, thereby enabling the quantity of the air reaching the hair of the user is substantially increased. A gateway server is communicatively coupled to the programmable controller.