Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1994-12-20
1997-12-09
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455314, 4551971, 455183, H04B 126, H04B 1500
Patent
active
056970897
ABSTRACT:
A device for generating a first signal and a second signal in a receiver for reception of a number of radio frequency signals. The first signal is mixed in a first mixer with the received radio frequency signals in order to generate an intermediate frequency signal which is subsequently mixed with the second signal in a second mixer. A first oscillator generates a signal which, after frequency multiplication in a frequency multiplier, is the first signal, the frequency of which can be changed in a number of frequency steps. A second oscillator generates the second signal, the frequency of which also can be changed in a number of frequency steps. The magnitude of the frequency steps by which the first signal can be changed is a multiple of the frequency steps by which the second signal can be changed.
REFERENCES:
patent: 4092594 (1978-05-01), Baker
patent: 4225974 (1980-09-01), Miyamoto
patent: 4491976 (1985-01-01), Saitoh et al.
patent: 5220680 (1993-06-01), Lee
Lofter Bjorn
Lundqvist Bjorn
Armstrong Darnell R.
Eisenzopf Reinhard J.
Telefonaktiebolaget LM Ericsson
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