Interface control system for exchanging signals by superposing signals to an existed signal line using low voltage differential signal
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United States of America Patent
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Nov 26, 2002
Grant Date -
Feb 28, 2002
app pub date -
Mar 13, 1998
filing date -
Mar 25, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Signals are transmitted through a plurality of transmission channels, each including at least a pair of signal lines for transmitting an interface signal, between a transmitter and a receiver. A predetermined signal is modulated by a modulator with a high-frequency signal, and the modulated signal is provided to a signal line of one of the plurality of transmission channels. A demodulator receives the modulated signal transmitted via this signal line, and demodulates the modulated signal from the signal line based on the frequency of the high-frequency signal. According to the above-described configuration, an interface control method and apparatus which can newly exchange other data and control signals while conforming to existent interface specifications are provided.
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