Patent ID: 8055253

Claim:
A transceiver device having a direct conversion structure, the device comprising: a reference transceiver; a plurality of remaining transceivers; and a plurality of transmission calibration paths connecting the reference transceiver and the plurality of remaining transceivers, wherein one of the plurality of transmission calibration paths is activated via controlling switches on the transmission calibration paths, the activated transmission path corresponding to a transmission calibration path between a transceiver selected from the plurality of remaining transceivers for transmission calibration and the reference transceiver, wherein the reference transceiver includes an envelope detector for transmission calibration, and the plurality of remaining transceivers do not include envelope detectors for the transmission calibration, wherein a test signal is transmitted to the selected transceiver and the transmission calibration of the selected transceiver is performed base on the test signal output through the activated transmission calibration path, and the transmission calibration comprises adjustment of a transmission frequency of a transceiver being calibrated.