| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple, easy and inexpensive means that changes the phase of a digital signal. SOLUTION: This invention provides apparatus (100) and method (300) for adjusting the phase of an output digital signal while maintaining the symmetry of the input signal. The apparatus (100) includes an input waveform signal (10) and a comparator (20) having a positive feedback path to an input and an output. An adjustable resistor (30) is connected along the positive feedback path to the output of the comparator (20) and to the positive input of the comparator (20). The apparatus (100) produces an output waveform signal (40) shifted in phase from the input waveform signal (10) with the same duty cycle as the input waveform signal (10).
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