A High Performance VHF Solid-State TV Tuner

Investigation was conducted on the evaluation of various solid-state devices with particular emphasis on signal-handling capability (cross-modulation performance) and the circuit techniques for filtering the interfering signals for VHF TV tuners. From this investigation, some clear requirements are ascertained as to the selection of the solid-state devices and to the circuitry for the VHF TV tuners. On the basis of these requirements, a high performance solid-state tuner was developed whose performance surpasses that of tube equipped tuners in all respects except gain.