Telecommunications – Transmitter and receiver at same station – With frequency stabilization
Patent
1994-11-16
1996-11-12
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at same station
With frequency stabilization
455260, 455296, H04B 140
Patent
active
055749860
ABSTRACT:
In a cordless telephony system such as CT1 or CT1.sup.+ there is only a small separation between the transmit and receive frequencies. Consequently, when transceivers with so-called dual frequency synthesizers in a single package are used for the respective receiver and transmitter branches, crosstalk via the synthesizer package occurs between the two branches. To suppress such crosstalk, in accordance with the invention low pass and high pass filters are included in the respective paths from the receiver and transmitter branches through the dual frequency synthesizers.
REFERENCES:
patent: 5175729 (1992-12-01), Borras et al.
patent: 5249305 (1993-09-01), Wieczorek et al.
patent: 5461344 (1995-10-01), Andoh
Banks-Harold Marsha D.
Eason Leroy
Eisenzopf Reinhard J.
U.S. Philips Corporation
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