| 摘要 |
PURPOSE:To decrease the number of signal lines from a channel section, by giving a function to produce a channel pulse required for the channel of itself to a plurality of channel sections and inputting and outputting a PCM coding pulse with a wired OR. CONSTITUTION:A frame clock 11 is transmitted from a frame pulse generating circuit 4 to channel sections 141, 142,...14n. A function of channel pulse generating circuit, i.e., a function to produce a required channel pulse for the channel of itself is given to the channels 141, 142...14n. The channels 141, 142...14n output PCM coded pulse trains 81, 82...8n when the channel pulse is at logical 1. These PCM coded pulses are wired-ORed and transmitted to lines via an output terminal 7. A frame pulse 12 is outputted from a frame pulse generating circuit 4 and wired-ORed with a signal line on which the PCM coded pulse train is transmitted, and transmitted to the lines via the output terminal 7. |
