发明名称 |
ANORDNING VID EN SENDARE FOR KOMMUNIKATION OVER KRAFTLEDNINGAR |
摘要 |
An audiofrequency signal is applied to a power amplifier having an output impedance of considerably less than an ohm that is coupled through a network comprising at least a capacitor that presents a low impedance to this audiofrequency signal and much higher impedance to energy at the 60 Hz power frequency to a power line to provide an amplified signal that is transmitted to a receiver separated from the transmitter by at least one distribution transformer and having a high pass filter for rejecting the 60 Hz power frequency and a number of harmonics thereof while transmitting the audiofrequency signal. The system is especially advantageous for using ordinary power lines for transmitting information in connection with automatic meter reading. |
申请公布号 |
SE405924(B) |
申请公布日期 |
1979.01.08 |
申请号 |
SE19740011405 |
申请日期 |
1974.09.10 |
申请人 |
* AMERICAN SCIENCE & ENGINEERING INC |
发明人 |
N H * JAGODA;K * KUBIERSCHKY;H S * BAKER |
分类号 |
G08C19/06;H04B3/54;(IPC1-7):04B3/54 |
主分类号 |
G08C19/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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