| 摘要 |
<p>PURPOSE:To decrease the circuit scale of a memory or the like for a matrix switch device by sending a phase difference between an input timing pulse and an internal timing pulse, and reducing quantity of information to be sent. CONSTITUTION:An input timing pulse (a) is compared with an internal timing pulse (c) of a matrix switch device by a phase difference detection circuit 31, in which a phase difference is detected. The phase difference is converted into, e.g. a 4-bit value. A reception section converts the 4-bit data into the phase difference and gives an output. The conversion is implemented by a timing pulse generating circuit 34. On the other hand, the input data (b) is given to the detection circuit 31 and a timing pulse having a proper phase difference with respect to the pulse (c) is generated by a timing pulse generating circuit 32 and read by a register 33. Similarly, a register 35 of the reception section is driven by the timing pulse decoded by a generating circuit 34 and a data is outputted.</p> |
