IC Voltage Variable Capacitors (VVC)

This paper discusses the IC variable voltage capacitor (VVC) device design, its characteristics and application to the VHF tuner. Special measurement methods and tuner performance results are also discussed. It has been experimentally verified both by the device test data and by the VHF tuner performance results, that the multiple diffusion of VVC cells on a single substrate is feasible. The important result accomplished by this experiment is the elimination of the uneconomical matching of capacitances which is required for the discrete VVC devices. The IC VVC, as an economical tuning element, is a practical answer for future solid-state tuners.