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Recently, several new approaches to the design of television tuning systems have emerged. Federal regulations concerning equal parity for UHF and VHF tuning systems have caused increased interest in purely electronic tuning systems. In addition, such factors as reliability, economics, aesthetics and convenience, as well as the increased number of channels on UHF and cable, have spurred interest in the development of solid state, totally electronic television tuning capability. The ideal tuning system incorporates all of these features.