| 摘要 |
An orthogonal modulator capable of eliminating an offset component between an I signal and a Q signal. The orthogonal modulator includes a generation circuit for generating a plurality of base band signals such as voice signal, a mixing circuit for mixing the base band signals and a plurality of carrier waves, an extraction circuit for extracting each DC offset component generated by the generation circuit or the mixing circuit, a comparison circuit for comparing the DC offset components thus extracted with each other, an addition circuit for adding a plurality of comparison results with other comparison results, and an offset elimination circuit for eliminating the DC offset components included in a plurality of addition signals by subtracting the DC offset components from the base band signals before they are applied to the mixing circuit.
|
