| 摘要 |
<p>PURPOSE:To obtain the clock regeneration system which can regenerate a clock of high quality even when long continuation of service bits is present in a received signal. CONSTITUTION:A write signal generating means 1 and a write control means 2 generate a write signal (c) from a received clock (b) and writes only information bits in a received signal (a) in a storage means 3. A read signal generating means 5 generates a read signal (e) from the output clock of a voltage-controlled oscillator 8 and reads the contents of the storage part 3 out in order to obtain an output signal (f). A phase comparison signal generating means 4 generates a phase comparison signal wherein the information bits in the received signal (a) and service bits other than the information bits are dispersed equally with time. A phase comparing means 6 detects the phase difference between the phase comparison signal (d) and read signal (e) and generates a phase difference signal. The voltage-controlled oscillator 8 is controlled by a closed loop which uses a low-pass filter 7 according to the phase difference signal to obtain a regenerated clock.</p> |
