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Low power, high bandwidth, low latency data bus

  • US 10,734,012 B2
  • Filed: 09/07/2018
  • Issued: 08/04/2020
  • Est. Priority Date: 09/07/2017
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a device controller coupled to a first interface for digital audio data communications in accordance with a first communications protocol, the device controller including a master bus controller for controlling a multi-drop bus in accordance with a second communications protocol; and

    a first slave device coupled to the multi-drop bus and configured to transmit and receive digital audio data communications with the device controller in accordance with the second communications protocol;

    wherein each transmission line of the multi-drop bus is terminated using the first slave device attached at one end of the transmission line and by the device controller attached at the other end of the transmission line and wherein the multi-drop bus is configured to support one or more intermediate signaling nodes such that reflections due to mismatches in impedance by inclusion of the intermediate signaling nodes are controlled to allow multi-drop device support and high speed signaling;

    wherein the intermediate signaling nodes are connected to the transmission lines with short interruption to a travelling wave, and wherein stubs and/or disruptions of the transmission lines are shorter than the shortest wavelength used for signaling; and

    wherein the second communications protocol supports multiple audio data rates using a fixed frame format.

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