Circuit configuration for range switching in tuners

Details Circuit configuration for range switching in tuners Circuit configuration for range switching in tuners

1991-05-20

1993-04-20

Gensler, Paul

Tuners

Combined diverse-type tuners

334 15, 334 47, 4551882, H03J 524

Patent

active

052046451

ABSTRACT:
A circuit configuration for range switching in tuners having at least two ranges includes at least two preselector stages each being assigned to a respective tuner range. Each of the preselector stages is connected between a supply potential terminal and a reference potential terminal. Each of the preselector stages has an input terminal, an output terminal and an MOS tetrode with a source terminal. A switchgear has switch outputs to be connected to the reference potential terminal for activating each of the MOS tetrodes. At least one resistor is connected between the source terminal of at least one of the MOS tetrodes and at least one of the switch outputs.

REFERENCES:
patent: 4048598 (1977-09-01), Knight
patent: 4442548 (1984-04-01), Lehmann
patent: 4461038 (1984-07-01), Miyoshi
patent: 4590612 (1986-05-01), Ijichi
patent: 4823099 (1989-04-01), Leipert
"ICs fur die Unterhaltungselektronik" 1986, Siemens Dalenbuch: pp. 767-768.

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