| 摘要 |
<p>A phase shifting circuit for shifting a phase of an input pulse signal, comprises a first delay circuit (6) for delaying said input pulse signal so as to produce a first pulse signal having a first pulse width; a second delay circuit (10) for delaying said first pulse signal so as to produce a second pulse signal having a second pulse width; smoothing circuti (7) for smoothing said first pulse signal; and a comparing circuit (8) for comparing an output signal level of said smoothing circuit with a predetermined reference level so as to produce a control signal dependent on a difference between the two compared levels.</p> |
