| 摘要 |
A quadrature device 1 for a communication device, receiver, transmitter, transceiver, telephone, mixer, modulator or demodulator comprises I and Q signal paths and corresponding signal paths components 2 I, 2 Q; 4 I, 4 Q; 9 I, 9 Q showing a mismatch. The device 1 comprises switching circuitry 3, 3', 6, 3'', 3 ''' for data dependently exchanging the I and Q signals in the I and Q paths in order to improve adverse effects, such as reduction of leakage of quantisation noise from the image band to the signal band in a quadrature modulator. Even mismatch effects between digital to analog converters (DAC's) in a feedback path of a sigma delta (SigmaDelta) modulator are compensated.
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