Sony single wire interface technology facilitates both internal data transmission and power supply with a single cable

Sony has developed single wire interface technology, a hybrid transmission technology which facilitates both data and power transmissions through a single cable. This technology enables the internal wiring of a mobile device to be streamlined through a single cable (copper wire). Conventionally, the video, audio and control signals as well as the power transmission were spread out over several dozen cables within the movable mechanisms of mobile devices, such as hinges or rotating parts. Sony aims to promptly implement this technology to improve design flexibility, reliability and durability for mobile devices with movable mechanisms.

Sony’s newly-developed ‘single wire interface technology’ has achieved bi-directional transmission of several kinds of signals, including video, audio and control signals, by using time division duplex and multiplex. In addition, the DC power is supplied on the same signal cable. Sony’s unique encoding technology with DC balance enables both DC power supply and high speed data to be transmitted within a limited frequency bandwidth. In order to swiftly begin practical implementation of this technology, Sony has teamed up with ROHM Co., Ltd. (‘ROHM’), which has a track record in peripheral technologies, for the joint development and technical validation for the analog portion of the test chip.

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