Band switching circuit of a tuner

Details Band switching circuit of a tuner Band switching circuit of a tuner

1989-06-20

1990-11-20

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455188, 455191, 455266, 455340, 334 15, 334 56, H03J 524, H04B 116

Patent

active

049725092

ABSTRACT:
In a tuner circuit in which a plurality of band signals are received by a single common high frequency amplifier stage, a band switching circuit switches a resonant circuit to .lambda./2 type when the amplifier stage receives the highest band signals and to .lambda./4 type when the amplifier stage receives band signals other than the highest band signals.

REFERENCES:
patent: 4070627 (1978-01-01), Jasinski et al.
patent: 4168478 (1979-09-01), Schriegral
patent: 4291290 (1981-09-01), Ijichi et al.
patent: 4555808 (1985-11-01), Fujimoto
patent: 4555809 (1985-11-01), Carlson
patent: 4749974 (1988-07-01), Yamamoto et al.
patent: 4876739 (1989-10-01), Wa et al.

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