| 摘要 |
Systems and methods for power and bidirectional data transmission using a plurality of wires are described which are useful in body implanted electronics. A multiphase digital signal is sent from a main unit to a remote unit over the plurality of wires and is converted to a DC power signal used to power the remote unit. Uplink data is sent from the remote to the main over one selected wire during a predetermined time period for an uplink transmission by amplitude modulating the received digital signal at the remote. During an uplink, the output impedance of the line driver connected to the wire selected for the uplink in the main unit is increased to allow for the uplink amplitude modulation. Nevertheless, the modulated signal is maintained within the noise margins of the digital circuits in the main and remote units to allow the signal on the selected wire to be recognized as valid digital levels by the digital circuits for proper processing. Digital data can be downlinked from the main to the remote by pulse edge modulation of the multiphase signal at the main unit. |
