An inventive procurement system includes a requisition system for special item purchases that are not found when searching a catalog database. The circuit may further include a second set of switches coupling the top plates of the sampling capacitors to the input signals, the second set of switches being controlled by the first and second clock signals. The central portion of one long side of the anode frame serves as an electron converging part. Each of the first and second contact ends are proximate the output end of the dielectric body and form a first pair of electrical contacts. The link minimizes state transition time at the end of each data pulse. When the semiconductor integrated circuits are separated, cutting off of the wiring pattern causes the switch to be turned off, so that the internal circuit is prevented from being affected by the influence of the cutting plane.