| 摘要 |
<p>PURPOSE:To assure a sound of high quality and to facilitate an easy control of program searching for a switchboard, by reading and delivering successively the digital information of each memory and then writing the information to a memory of the next stage with the designation of an address counter. CONSTITUTION:An input switch ISW is closed with loop switches LSW0-N opened for the input of the talkie information. Then the analog sound information is fed through a terminal (a) and converted into the digital information through a converting circuit IDC to be fed to an RAM1. As a result, an address counter AC starts counting with a clock pulse (c) to control the timing of the writing/reading operation of RAM1-N as well as to designate an address. In accordance with the address designation of the counter AC, the data of RAM1- N are shifted with each bit. At the same time, the information read out of each RAM of output terminals OUT1-N are delivered successively, and at the same time the writing is carried out to an RAM of the next stage.</p> |
