Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1997-04-04
1999-03-23
Chin, Wellington
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455 84, 455103, 455141, 455318, H04Q 0730
Patent
active
058872671
ABSTRACT:
A transceiver board for use in a cellular radiotelephone base station comprises a first cellular radio transceiver including a first controller that controls the operation of the first transceiver, a second cellular radio transceiver including a second controller that controls the operation of the second transceiver, common local oscillator that generates a tuning signal used by the first and second transceivers for tuning a radio signal, and an arbitrator that is connected to the first and second controllers and that determines which of the first and second controllers communicates with the common local oscillator. Preferably, the arbitrator is implemented by a programmable device such as a programmable logic device (PLD) that monitors the first and second controllers to determine which controller attempts to communicate with the common local oscillator first so that that controller is allowed to communicate with a common local oscillator to the exclusion of the other controller. Alternatively, the arbitrator can be implemented by a programmable device that monitors the first and second controller and a tristate buffer that is connected to the programmable device and that connects either the first or second controller to the common local oscillator as controlled by the programmable device.
REFERENCES:
patent: 5142693 (1992-08-01), Hanks et al.
patent: 5592480 (1997-01-01), Carney et al.
PCT International Search Report, PCT/US 98/06534.
Chin Wellington
Ericsson Inc.
Sobutka Philip J.
LandOfFree
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