| 摘要 |
PURPOSE:To obtain stable internal bit synchronizing signal, by controlling the phase of a bit synchronizing signal of digital information transmitted from a transmission side and of an internal bit synchronizing signal at reception side and taking synchronism for both bit synchronizing signals. CONSTITUTION:Digital information at an input terminal 1 is applied to a wave shape circit 3 to detect edges of leading and trailing of the input digital information, and picked up bit synchronizing pulses are generated and they are applied to one input terminal of a phase comparator 4. An output pulse of a voltage controlled oscillator VCO is applied to another input terminal of the comparator 4, the circuit 4 detects the phase difference and an analog signal corresponding to the phase difference is outputted. This output is applied to a sample hold curcuit 6, and a sample hold circuit is provided at the post stage of the circuit 6, and the operation of both circuits 6, 7 are controlled with a sampling timing controller 8. Thus, the effect of phase signal caused by missing bit synchronizing pulse can be rejected. |
