| 摘要 |
PURPOSE:To detect a collision easily in a CSMA (signal detection multiple access) system by comparing a transmission level with a reception level. CONSTITUTION:A signal from a transmitting logic part 6 controls an analog switch 5 to send out a source voltage for a transmit signal level to a circuit 1 through a transmitting impedance element. A received part is compared by a comparator 8 with the level of a voltage source 7 for a threshold level to compare the transmission level with the reception level, judging a collision when they are not coincident with each other. |
