| 摘要 |
<p>PURPOSE:To surely recover a clock frequency-locked to a transmission side clock by providing a bit number of clock frequency information larger than the bit number required to represent the exclusive OR of a maximum value and a minimum value of a recovery clock count decided by the operating frequency range and the count period of a voltage controlled oscillator. CONSTITUTION:The bit number R is obtained as shown in the following in deciding the operating frequency range f0+ or -delta and the count period T of the voltage controlled oscillator 400: with f0+ or -delta=6X10<6>+ or -6X10<3>Hz and T=0.033 sec, then the maximum value of the recovery clock count is 110000011000110110 and the minimum value of the recovered clock count is 1100000100101010 and the exclusive OR between the maximum value and the minimum value of the recovery clock count is 000000001010011100. Thus, the relation of N>10-bit exists and the disabled control that the frequency of the recovered clock exceeds the frequency range specified by the bit number of the clock frequency information is prevented.</p> |
