| 摘要 |
A quadrature generator (975, 1075) for generating a pair of pulse trains maintai ned in perfect phase quadrature with one another. The quadrature generator (975, 1075) includes a feedback control loop for alteri ng the duty cycle of an oscillating signal applied to a master-slave flip-flop pair (450, 650) configured to generate a pair of pulse tr ains maintained in a relative phase relationship. The feedback control loop controls the duty cycle of the oscillating signal applied to the ma ster-slave flip-flop pair (54, 58) which, in turn, is determinative of the phase relationship between the pulse train pair generated by the master-s lave flip-flop pair (54, 58). When the pulse trains generated by the flip-flop pair (450) are beyond phase quadrature, a control signal genera ted by the feedback control loop alters the duty cycle of the oscillating signal applied to the flip-flop pair (450); to alter the phase relat ionship between the pulse trains of the pulse train pair.
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