| 摘要 |
<p>PURPOSE:To use the protection network of an inexpensive circuit constitution by bringing DATA and CLOCK which are inputted to frequency division in a prescribed frequency division ratio and outputting them, respectively. CONSTITUTION:A clock (CLOCK) is brought to frequency division in a prescribed frequency division ratio in a frequency dividing circuit 15 and brought to all phase output, and by a pulse detecting circuit 20 and a selecting circuit 25, one of the outputs brought to all phase output is outputted as a frequency- divided output. Also, input data (DATA) synchronizing with the CLOCK is outputted as extended pulse width by a D-type flip-flop 10, based on the CLOCK which is brought to frequency division and all phase output. In such a manner, the protection network of an inexpensive circuit constitution for operating by a low frequency, comparing with the transmission rate of the DATA and the CLOCK which are inputted can be used, and the whole device can be obtained at the low cost.</p> |
