| 摘要 |
PURPOSE:To branch and insert an arbitrary low-order group signal out of a high-order group signal by providing a circuit connecting a switch part and a selector part with a bus between a demultiplexer and a multiplexer in a circuit handling a synchronization multiplexing signal for which the time division multiplexing is executed. CONSTITUTION:A demultiplexer 10 separates a high-order group input signal to (n) pieces (n>1) of a low-order group signal (a). A branch processing circuit 13 is equipped with a switching part 14 to extract (m) pieces (1<=m<=n) of a branch low-order group (b) selected by a branch control signal from the low- order group signal (a). A signal C outputted to a data bus 17 by a switching part 14 is the same one as the inputted low-order group signal (a). An inserting processing circuit 15 is equipped with a selector part 16. the selector part 16, based on the given inserting control signal, replaces a low-order group signal C included in the high-order input signal to a part or all of l pieces (1<=l<=n) of a low-order group signal (d) to be inserted and outputs (n) pieces of a low- order group signal (e). The low-order group signal (e) is multiplexed by a multiplexer 11 and a high-order group output signal is sent.
|
