Planar printed circuit board arrangement useful in the uhf portion of a television tuner

摘要: A tuner for a television receiver comprises circuit board formed by slab of dielectric material having conductors located on one side and discrete components mounted the other so that it may be readily assembled soldered. Some are arranged to form capacitors distributed parameter inductors. In UHF portion strip-like conductor wider ground spaced apart in parallel relationship. The length gap between is selected provide inductive reactance band. slot cut, punched or otherwise through increase Q (the figure merit inversely related loss) inductor at upper end range. addition, significantly improves thermal stability inductor. Furthermore, combination associated with another utilized mount varactor diode, coupled tuned circuit, determines gap. preferred arrangement, two slots unitary die minimize variation inductance values from due registration errors.