| 摘要 |
<p>PURPOSE:To simplify the constitution, by circulating the output of a PN code generator to generate the PN code and by discriminating establishment of synchronization when this PN code and input data are compared with each other to find coincidence of a certain number or more. CONSTITUTION:A receiving code string including the PN code as a synchronizing signal is inputted to a PN code generator 7 through the A dise of a switch S. Then, the PN code generator 7 generates the PN code circularly, and this generated PN code and the receiving code string are compared with each other by a comparing circuit 4. When they coincide with each other, a clock gate 5 is opened, and an output pulse is outputted for every clock signal and is counted by a counter 6. When the count number of the counter 6 reaches a certain number, establishment of synchronization is discriminated, and the switch S is switched to the B side.</p> |
