| 摘要 |
The present invention is relating to a circuit for transmitting and receiving an image signal using a power line, wherein the transmitting circuit comprises; a bias unit for controlling a bias voltage of an image signal taken by a CCD camera; a differential amplifier, to which a power is supplied through a voltage drop unit, for amplifying the image signal which has passed through the bias unit into the broad-band signal; an oscillator IC, which is driven by using the image signal amplified into the broadband signal by the differential amplifier as an input power, for modulating the image signal while loading the image signal into the carrier frequency of an oscillation frequency; and transformers for inducing an alternating current image signal from the image signal modulated by the oscillator IC and outputting the image signal to the AC power line; and a receiving circuit comprises; a rectifier for supplying the AC power through the AC power line as a power required for operation; a transformer for inducing an alternating current image signal by an LC-tuned frequency with respect to an alternating current image signal received through the AC power line; an amplifier for amplifying the alternating current image signal to correct a receiving sensitivity; and an output amplifier for amplifying the output of the amplified image signal. Thereby, the circuit for transmitting and receiving an image signal using a power line according to the present invention can be characteristically manufactured at a low cost and installed with ease.
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