| 摘要 |
PURPOSE:To obtain easily multiplexed data of a different speed to use lines effectively, by storing a low-speed data signal in plural shift registers and by switching and selecting their outputs and by adding frame information to them. CONSTITUTION:Low-speed data A-1-A-n are inputted to low-speed data registers 1-1-1-n in serial; and when a prescribed number of bits is stored, register outputs B-1-B-n are inputted to shift registers 2-1-2-n in parallel. Signals C-1- C-n stored in shift registers are held till coming of the next parallel input signal while shifting the same signal successively. When a drive control signal E is applied to a switch 3, signals C-1, C-2-C-n are selected successively by the switch 3, and a signal G is outputted from the switch 3, and a frame bit is added to the signal G by a frame bit adding circuit 4, and a multiplexed signal H is outputted. The switch 3 is set properly to multiplex easily lines different in transmission speed. |
