Tuner device for a television receiver
AssigneeIndesit Industria Elettrodomestici Italiana S.p.A.
InventorEdoardo Dipietromaria
Life of this patent
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Abstract
A tuning device for a television receiver in which the electrical components are largely formed by thick film deposition techniques on a ceramic support plate. The tuning device includes a frequency converter which acts to convert the input frequency to the intermediate frequency of the receiver and which is fed by preceding filters and converter circuits only with UHF signals regardless of whether the receive is tuned to the VHF or the UHF wave band. This is achieved by means of high- and low-pass filters and a further converter circuit which converts VHF signals to UHF when energized to do so by an oscillator which is controlled to operate only when the VHF wave band is selected.
Claims5
A signal tuning device for a television receiver, including an intermediate frequency amplifier for receiving, selecting, amplifying ad converting to the intermediate frequency of the television receiver signals belonging to both the VHF and UHF ranges;
- said device including a first section for receiving and amplifying signals belonging to the UHF range and converting them to said intermediate frequency;
- said first section including first circuit means for amplifying UHF signals and converting signals belonging to the VHF range into signals belonging to the UHF range, and second circuit means for supplying a first local signal and mixing said first local signal with the amplified UHF signals from said first circuit means so as to convert them to said intermediate frequency for application to said IF amplifier;
- said first section including a plurality of circuit elements being formed by means of the deposition of conductive or resistive material onto a support made of insulating material;
- said plurality of circuit elements including resonant lines, conductive circuit elements, resistive circuit elements, inductive circuit elements and capacitive circuit elements;
- said device further including a second section for receiving and amplifying signals belonging to the VHF range and for generating a second local signal and supplying said amplified VHF signals and said second local signal to said first circuit means of said first section;
- said first circuit means mixing said second local signal and said amplified VHF signals to convert them into signals to the UHF range.
Dependencies are inferred from the claim text.