| 摘要 |
PURPOSE:To prevent the generation of the harmful low-frequency jitters in the range of allowable fluctuations of the frequency of each input and output signal, by providing a pulse stuffing synchronizer which consists of a buffer storage device, a write counter, a read counter, etc., and makes a sampling phase comparison. CONSTITUTION:A buffer storage device 11 has one-bit storage elements ME1- MEi, which are given serial numbers indicating their positions and supplied with writing and reading indications successively circulating to the positions from a write counter 12 and read counter 13 respectively. A phase comparison 17 between an input clock pulse and a reference clock pulse from a terminal 3 is made and when their phase difference decreases below a certain value, the counter 13 is driven with the delay of >=1 pulse to obtain a stuff pulse. The number of pulses in an input pulse string constituting one stuff period is divided by the numbers of pulses in writing and reading sampling periods and the sum of integral values of the resulting remainders is calculated to bear the prime numeral relation of the sum value as to pulse numerals in the sampling periods. |
