DISTRIBUTION LINE CARRIER SIGNAL TRANSMITTER

• Main Authors: TORIKAI TAKAYUKI, TATARA HIROSHI
• Format: Patent
• Language: English
• Published: 01.03.1989
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

PURPOSE:To increase signal speed by synchronizing with a commercial frequency and transmitting a signal carrier between the lines of a distribution line with a prescribed time as one bit time. CONSTITUTION:The low tension side of a columnar transformer 6 is stepped down by a transformer 11, and the zero cross of the voltage waveform of a commercial frequency stepped down by a zero cross pulse generator 121 is obtained and thus, the pulse synchronized to a commercial frequency is generated. The pulse is frequency-divided by a pulse frequency-divider 121. At a 30 baud pulse generator 13, while one period of the output waveform of a 30Hz clock generator 12 is made into one bit length in accordance with the inputted information code, the electric wave waveform of a high level is generated when input information is a mark and the voltage waveform of the low level is generated when it is a space. An amplitude modulating wave generator 14 outputs a series of the rectangular wave corresponding to the mark of the information code and the space code. A switching transistor 15 is controlled by the rectangular wave and a signal current is transmitted through the columnar transformer 6 to a transformer station.