| 摘要 |
The TDM type time sharing switch broadcasts all channels by using the broad casting circuit. The circuit includes a first to a third exclusive NOR gate (61-63) for operating output signals of the 3 bit output terminal (D8,D9,D10) of a memory (20) and ID signals of corresponding channel, an AND gate (65) for operating output signal of a memory (20) through an enable terminal (D7) and output signals of the first to the third Ex-NOR gate, a OR gate (64) for operating output signals of a memory through 3 bit terminals (D8,D9,D10), and a multiplexer (66) for multiplexing output signals of a decoder (40), and the AND gate (45).
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