Patent ID: 7738847

Claim:
Circuit arrangement for reception of television channels, comprising: a tuner having a control amplifier, an automatic gain control for said control amplifier and a mixer connected with an input to an output of said control amplifier, the circuit arrangement comprising further a channel filter coupled with an input to an output of said mixer for filtering out a desired television channel, said mixer converting said desired television channel into an intermediate frequency range for said channel filter, said automatic gain control comprising a detector and a weighting filter, the weighting filter being coupled with an output to an input of said detector and with an input to the output of said mixer, upstream of said channel filter, for providing a control signal for said control amplifier via said detector, said weighting filter being a bandpass filter with a passband wider than the passband of said channel filter, which encompasses both the passband of said channel filter and at least one adjacent television channel, for adapting said automatic gain control to given adjacent channel conditions of said channel filter; and wherein said tuner has a preselection circuit for the preselection of television channels, and a mixer oscillator for converting said desired television channel to the intermediate frequency range as defined by said channel filter.