| 摘要 |
A DC offset calibration apparatus includes a first adjustment unit, a first offset calibration circuit, a second adjustment unit, and a second offset calibration circuit. The first adjustment unit adjusts a first input signal to generate a first output signal according to a first offset calibration signal. The first offset calibration circuit is coupled to the first output signal and the first adjustment unit for determining the first offset calibration signal according to the first output signal and predetermined threshold value. The second adjustment unit adjusts a second input signal to generate a second output signal according to a second offset calibration signal. The second offset calibration circuit is coupled to the second output signal and the second adjustment unit for determining the second offset calibration signal according to the second output signal and the predetermined threshold value. The first and the second input signals are a differential signal pair.
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