| 摘要 |
The circuit for communicating a number of information signal through the limited number of channel by extracting none-returnto-zero (NRZ) signal from the transmitted multilevel digital data comprises a horizontal synchronous signal separator (1), pulse generators (2,3) for extracting the colour synchronous signal and the clock run-in signal, switching circuits (4,5), low pass filters (6,7), differential amplifiers (8-10), a decoder (11), AND gates (12-14), mono/muties (15-17), a clock generator (18), and pulse generators (12'-14'). |
