Opto-couplers for communication bus interfaces using low efficiency silicon based LEDs
OwnerEugene Worleyinventor
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Abstract
This invention describes a means by which a communication data bus can be electrically isolated from noise generating electrical devices such as electromagnetic actuators, which are controlled by data from the bus, using a single integrated circuit package. Specifically, an all silicon optically isolated interface within the package is used to galvanic insulate the circuitry associated with the data bus interface from the circuitry operating or receiving data from devices such as motors, sensors, etc. that are connected to a noisy environment.
Claims18
An optically isolated bus interface, comprising:
- a first chip comprising,
- an integrated data bus receiver;
- and
- an integrated silicon LED coupled to the data bus receiver;
- a second chip comprising,
- a integrated photo detector;
- and
- an integrated device driver coupled to the photo detector;
- and
- a transparent insulator disposed between the first and second chips, wherein the photo detector and the silicon LED form an optical link between the first and second chips through the transparent insulator.
An optically isolated bus interface, comprising:
- a first chip comprising,
- an integrated data bus transmitter;
- and
- an integrated photo detector coupled to the data bus transmitter;
- a second chip comprising,
- an integrated silicon LED;
- and
- an integrated device receiver coupled to the LED;
- and
- a transparent insulator disposed between the first and second chips, wherein the photo detector and the silicon LED form an optical link between the first and second chips through the transparent insulator.
An optically isolated bus interface, comprising:
- a first chip comprising,
- an integrated data bus receiver;
- and
- an integrated silicon LED coupled to the data bus receiver;
- a second chip comprising,
- a integrated photo detector;
- and
- an integrated multiplexer coupled to the photo detector, wherein the multiplexer comprises a plurality of outputs configured to be coupled to devices;
- and
- a transparent insulator disposed between the first and second chips, wherein the photo detector and the silicon LED form an optical link between the first and second chips through the transparent insulator, and the multiplexer formats and routes data received from the data bus receiver via the optical link to one of the plurality of outputs.
Dependencies are inferred from the claim text.