| 摘要 |
A three level signal is converted to a two level signal for transmission through a bi-level digital device by separating the opposite polarity parts of the three level signal. One part is inverted at an inverter and devices such as monostables are used to form two pulse trains in which the pulse lengths are different. The pulse trains are combined at a mixer and then transmitted through the device. Also disclosed is a decoder for decoding the pulses after transmission through the device. |
