Dual mode transceiver

Details Dual mode transceiver Dual mode transceiver

1996-07-03

1999-03-09

Faile, Andrew I.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 86, 455266, H04B 144

Patent

active

058813691

ABSTRACT:
A dual mode transceiver architecture suitable for adaptation in either a handset or a base station and capable of operating in both Frequency Division Duplex (FDD) mode or in Time Division Duplexing (TDD) mode is disclosed. Such a transceiver has an up conversion path capable of up converting an Intermediate Frequency (IF) to a Radio Frequency (RF) signal in either an upper band frequency range or a lower band frequency range. Also the transceiver has a down conversion path, used for receiving, for down converting a RF signal in either the upper band or lower band to a desirable IF frequency. The transceiver includes a switch array capable of switching the up conversion path to either the upper band port or the lower band port of a diplexer and the switch array also switches the upper band port and lower band port of the diplexer to the down conversion path depending on whether the transceiver is operating in TDD mode or FDD mode. Also, if in TDD mode, the switch array determines whether the transceiver is transmitting or receiving.

REFERENCES:
patent: 5465409 (1995-11-01), Borras et al.
patent: 5475677 (1995-12-01), Arnold et al.
patent: 5483209 (1996-01-01), Takayama
patent: 5550895 (1996-08-01), Burson et al.

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