Tuner of a double superheterodyne receiver

Details Tuner of a double superheterodyne receiver Tuner of a double superheterodyne receiver

1994-01-03

1995-10-10

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551891, 455301, 455310, 455317, 361814, 361818, H04B 110

Patent

active

054578175

ABSTRACT:
A first PLL 15 circuit connected to a first local oscillator 4 and a second PLL circuit 18 connected to a second local oscillator 10 are disposed in a same casing 20, and it is therefore not necessary to issue the output signal of the second local oscillator 10 or the divided output signal of the first local oscillator 4 outside of the casing 20, so that generation of undesired harmonic interference due to adverse effects of distribution thereof may be eliminated, thereby obtaining a favorable reception state.

REFERENCES:
patent: 4352209 (1982-09-01), Ma
patent: 4494095 (1985-01-01), Noji et al.
patent: 4569084 (1986-02-01), Takahama
patent: 4689825 (1987-08-01), Geiger et al.
patent: 4691378 (1987-09-01), Kumamoto et al.
patent: 5179729 (1993-01-01), Mishima et al.

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