Multi-band tranceivers with reduced frequency sources for...

Details Multi-band tranceivers with reduced frequency sources for... Multi-band tranceivers with reduced frequency sources for...

2005-10-04

2005-10-04

Tsang, Fan (Department: 2645)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S073000, C455S078000, C455S086000, C455S553100

Reexamination Certificate

active

06952593

ABSTRACT:
A system and method for using a dual band transceiver to transmit and receive in a first and second band, while reducing the frequency sources. By reducing the number of frequency sources needed to operate a dual band transceiver and using common transmitter and receiver Intermediate Frequencies, the invention also reduces the number of filters and other components needed for its operation. The oscillating signals from these two frequency sources are scaled, combined, mixed, and filtered, such that only two primary frequency sources are needed to operate the front-end and back-end of both the transmitter and receiver of this dual band transceiver.

REFERENCES:
patent: 6438358 (2002-08-01), Higuchi
patent: 6587673 (2003-07-01), Higuchi

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