| 摘要 |
PURPOSE:To increase the amount of transmission information per unit time by converting analog informationn into digital information, writing the converted information to a storage device at a speed, and then reading the information at a speed faster than the write speed to transmit it to an opposite station. CONSTITUTION:An alalog signal at an input terminal 1 is converted into a digital signal by an A/D converter A/D-1 and the signal is written in a storage device ME-1 by using a clock signal from the 1st clock circuit CL-1 at the transmission side. The clock signal generated by the clock circuit CL-1 is converted into a high-frequency signal by the 2nd clock circuit CL-2, and the digital signal of the storage section ME-1 is read from a read circuit RE-1 as a faster speed. On the other hand, the 2nd clock signal is extracted by a clock regeneration circuit CLR in the reception station from the digital signal applied to an input terminal IN-1, and the said signal is inputted to a channel selecting circuit CHS and a storage circuit ME. After the signal is regenerated by the 1st clock signal obtained by a frequency circuit DIV, the signal is restored through D/A conversion. |
