| 摘要 |
A variable delay apparatus comprising: a variable delay unit configured to receive a trigger signal and a series of control word inputs to produce a series of output signals 5 delayed from the trigger signal by a series of amounts within a delay range, the series of amounts being associated with the series of control word inputs; and a calibrating unit configured to receive the series of output signals from the variable delay unit and to receive at least one fixed output signal delayed from the trigger signal from at least one fixed delay source, said at least one fixed delay source being configured to provide io the at least one fixed output signal within the delay range for calibration purposes, said calibrating unit configured to compare said series of output signals from said variable delay unit with the at least one fixed output signal to calibrate the series of amounts and the series of control word inputs to control operation of said variable delay unit over said delay range so as to produce a series of increasing delays incremented 15 substantially linearly with each cycle of the trigger signal independently of environmentally-induced drift, or so as to produce a series of decreasing delays decremented substantially linearly with each cycle of the trigger signal independently of environmentally-induced drift. POINT 0 POINT (-I NSEC) (-9 NSEC) POINT A POINT B (-9 NSEC) (-18 NSEC) -- ----------------------- DETECTERA YTO 402D 0 COTROLGE TRIGGER_ DETECTER 0 TO 401 D CONTROL SUNIT DETECTER A T |
