| 摘要 |
<p>PURPOSE:To prevent a storage device using a timing adjusting circuit previously from the generation of an error output and to improve the reliability of the device by checking the output part of a decoding circuit under the output stopped status of a timing signal generating circuit to detect a failure. CONSTITUTION:Four delay elements 21-24 are connected in series to the output of the timing signal generating circuit 1, the outputs of respective delay elements 21-24 are inputted to one input of each of selecting gate circuits 31-34 and the outputs of a decoding circuit 5 which are obtained from an input through a selection control signal input terminal 4 are the other inputs of said selecting gate circuits 31-34. Respective outputs of the selecting gate circuits 31-34 are connected to a storage element group M through an OR circuit 6 and a timing signal 7 is outputted from the element group M. In addition, the output of the circuit 1 is branched and connected to an inable terminal of the decoding circuit 5 to control the circuit 5 and a failure detecting signal 91 of the decoding circuit is outputted from the output of an AND circuit 9 to a terminal 10 through an OR circuit 8.</p> |
