Input circuit comprising at least two input paths

Details Input circuit comprising at least two input paths Input circuit comprising at least two input paths

1984-05-11

1986-03-18

Gensler, Paul

Tuners

Combined diverse-type tuners

333103, 334 47, 455188, H03J 500, H04B 118

Patent

active

045771715

ABSTRACT:
An input circuit comprises at least two input paths which are connected to a common input terminal and which are alternately connectable to a common output. The input paths form selection members for the UHF and VHF frequency range whose signals are amplified in a common preamplifier component. In order to avoid mutual influencing of the selection members with simple measures, the output of the VHF selection member is connected to the common output via an impedance of the UHF selection member and a switch is provided for connecting the impedance and the output of the VHF selection member to ground for high frequency. The switch is conductive during UHF operation and then short circuits the output of the connected VHF input path.

REFERENCES:
patent: 4291290 (1981-09-01), Ijichi et al.
patent: 4418428 (1983-11-01), Evans

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