| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in a conventional optical receiver that cannot have recovered data synchronously with input data and a clock, because there is a clock speed frequency of the input data is deviated from a pull-in range in the case that a pattern of the input data received by a data/clock recovery section of the conventional optical receiver takes a 0, 1, 0, 1 pattern and cycle cannot be established in the case of transmitting the 0, 1, 0, 1 pattern, when a transmission test or the like is conducted in the system operation. SOLUTION: This optical receiver is provided with a pulse generating circuit, which generates a pulse signal in timing required to take synchronization locking, in the case of detecting an optical signal and superimposing the pulse signal onto a control voltage received by a VCO in the data/clock recovery section can extend the pull-in range. |
