| 摘要 |
<p>An automatic skew calibration technique for a multi-channel signal source (12, 14) uses a cross-coupled flip-flop calibration circuit (18, 20) and a microprocessor (26) to align the timing of a pair of signals (X, Y) from the multi-channel signal source. The flip-flop calibration circuit indicates which of the pair of signals is leading, and the microprocessor uses the output (A, B) of the flip-flop calibration circuit to determine in which signal source to adjust the signal delay. The signal source is incrementally delayed by the microprocessor while the microprocessor also observes the output of the flip-flop calibration circuit. When the flip-flop calibration circuit indicates a time interval (T1 to T2) over which the relative time position of the input signals changes, then the microprocessor determines a calibrated value ((T1+T2)/2) for the signal delay, completing skew calibration of the multi-channel signal source. <IMAGE></p> |
