A suction structure includes a pad and a fixing base. Each flat unit is connected to a ground plane by a conductive stand at a connection point, for suppressing noise resonances at certain frequencies, and the frequencies are related to a stub length of each flat unit, and the stub length is related to a route length from the connection point to an end. According to several embodiments, the method of making an optical fiber includes providing at least one air hole and at least one stress rod adjacent to the core. One aspect of this accommodation may include providing a means by which the system may detect the location of the passband of the IF filter in the spectrum. Information concerning access to that data is stored and associated with an identifier assigned to a client device. Circuitry incorporated into each sense amplifier of the DRAM then isolates the digit line equilibrating circuitry in each sense amplifier from the cell plate voltage DVC2 or supply voltage VCC to which the equilibrating circuitry is normally connected and connects the equilibrating circuitry to ground instead.