Transmission device |
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| 申请号 | JP851381 | 申请日 | 1981-01-21 | 公开(公告)号 | JPS57121331A | 公开(公告)日 | 1982-07-28 |
| 申请人 | Yokogawa Hokushin Electric Corp; | 发明人 | AZEGAMI TADASHI; | ||||
| 摘要 | PURPOSE:To permit the receiving part to have a narrow dynamic range, by detecting the magnitude of a supplied voltage, which is received from a power supply line, by a signal transmitting part and by controlling the intensity of a carrier signal to be transmitted in accordance with the magnitude of this detection voltage. CONSTITUTION:Each signal transmitting part of a transmission device where plural signal transmitting parts are connected to a common power supply line and a power source device is connected near a common receiving part of the power supply line takes in the signal from an oscillator from a terminal 21 of a process information taking-in part 15 and converts this signal to pulses of a narrow width by a monostable multivibrator 23. The supplied power from the power supply line is supplied to a receiving part 18 through terminals 24 and 25 are passes through a constant voltage element 27 to become an operating power for taking-in part 15 and a modulating part 17. The voltage from the part 17 and the voltage from the terminal 24 are supplied to an inversion amplifier 33, and the output of the amplifier 33 is used as an operating power for a carrier generator 16. The output of the generator 16 is modulated by the modulating part 17 and is transmitted to the power supply line. | ||||||
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| 说明书全文 | |||||||
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