The present invention relates in general to integrated circuits, and in particular to method and circuitry for implementing an improved phase-locked loop in complementary metal-oxide-semiconductor technology using current-controlled CMOS logic. The apparatus also includes circuitry to process the first and second electrical to provide an electrical signal principally representative of the fetal heartbeat and circuitry to determine pitch periods of the signal principally representative of the fetal heart beat. The fluid-transporting assembly is comprised of a plurality of fluid-transporting conduits, each extending from an inlet port to an outlet port, wherein the assembly exhibits sufficient flexibility to allow movable positioning of the outlet ports with respect to the inlet ports. Tile lists comprise differentially encoded indices andor spatial coordinates for overlapping primitives. The makeup is supplied to the airbrush from one of a plurality of makeup collars that are affixed to the main body of the airbrush. The device includes a support member and a plurality of fluid transfer members extending from the support member.