| 摘要 |
<p>A delay time measuring device for measuring a delay time of continuous pulses wherein the averaging effect is improved. The device comprises a rough estimation counter means (14) and a precision measuring means (15, 16, 17, 18, 25, 26, 19), and the rough estimation counter means makes a rough measurement of a delay time by counting clocks of a reference signal generating means between a starting pulse and a stopping pulse. The precision measuring means performs a precision measurement of a delay time by synchronizing an output signal of a voltage controlled oscillator (17) with the stopping pulse and measuring a difference in phase between the output signal of the voltage controlled oscillator (17) and a signal generated by the reference signal generating means (1). Then, a delay time of pulses is measured by synthesizing a rough measured value by the rough estimation counter with the precision measured value (20).</p> |
