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Host-equalized optical inks

  • US 10,298,330 B2
  • Filed: 03/30/2016
  • Issued: 05/21/2019
  • Est. Priority Date: 03/30/2016
  • Status: Active Grant
First Claim
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1. A host-equalized optical transceiver comprising:

  • a driver analog interface that is configured to directly interface with a transmitter equalization circuit of a host system that is independent of the host-equalized optical transceiver, the driver analog interface having a length that is between six inches and 9.6 inches to limit signal degradation along the driver analog interface following equalization by the transmitter equalization circuit;

    a linear laser diode driver (LLDD) directly electrically coupled to the transmitter equalization circuit via the driver analog interface, the LLDD being configured to receive an equalized electrical data signal directly from the transmitter equalization circuit of the host system via the driver analog interface and to generate a driving signal based on the equalized electrical data signal, wherein the equalized electrical data signal is a linear and analog signal and is equalized by the transmitter equalization circuit of the host system prior to communication to the host-equalized optical transceiver such that the host-equalized optical transceiver performs no additional equalization prior to reception at the LLDD;

    an optical transmitter that is electrically coupled to the LLDD, wherein the optical transmitter is configured to receive the driving signal from the LLDD and to generate an optical signal that is representative of the driving signal;

    an amplifier analog interface;

    an optical receiver that is optically coupled to an optical fiber, wherein the optical receiver is configured to receive optical data signals communicated along the optical fiber and to convert the received optical data signals to electrical data signals representative of the received optical data signals, the electrical data signals including one or more degraded characteristics that develop as the optical data signals propagated along the optical fiber; and

    a linear trans-impedance amplifier (LTIA) that is electrically coupled to the optical receiver and directly electrically coupled to a receiver equalization circuit of the host system via the amplifier analog interface, wherein the LTIA is configured to receive the electrical data signals from the optical receiver and communicate amplified electrical signals directly to the receiver equalization circuit via the amplifier analog interface such that the amplified electrical signals include the degraded characteristics when the amplified electrical signals exit the host-equalized optical transceiver, and the amplifier analog interface includes a length that is between six inches and 9.6 inches to limit introduction of further signal degradation between the LTIA and the receiver equalization circuit,wherein the host-equalized optical transceiver does not include additional, module-based equalization circuits such that power associated with generation of the equalized electrical data signal is consumed at the host system and power associated with equalization of the degraded characteristics is consumed at the host system.

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