An electrical connector includes a base, an upper cover, terminals and a lever. Linking up the IO characteristics of the OTA and the CCCII and the reactance of grounded capacitor, the step of synthesis is first based on the algebraic analysis to oscillatory characteristic equations, resulting in a quadrature oscillator structure. A carton or napkin holder may comprise a one-piece blank which is adapted to be folded, resulting in a carton having a bottom panel, a first sidewall, and a second sidewall. The pellicle allows radiation to pass through the pellicle to the reticle and may prevent particles from passing through the pellicle.