Patent ID: 7643099
Filing Date: 2010-01-05
Classification: H03J,H04N

Abstract:
1. A television system comprising a tuner for tuning video signals, a controller for controlling said tuner, and a stage for receiving tuned signals from said tuner and for supplying at least one control signal to said controller, wherein said stage comprises an automatic fine tuning unit for generating an automatic fine tuning signal and a phase-locked-loop for generating a lock signal more quickly available than the automatic fine tuning signal, said lock signal forming said at least one control signal for said controller to provide an indication whether a channel at a tuned frequency is active or not, wherein said television system comprises a synchronization generator for synchronizing video signals originating from said stage and for supplying at least one synchronization signal to said controller, said controller comprising a switch for, in dependence of said lock signal, taking or not taking into account said synchronization signal.