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SIMULTANEOUS BANDWIDTH EXTENSION AT HIGH GAIN AND PEAKING REDUCTION AT MINIMUM GAIN FOR WIDEBAND, VARIABLE GAIN, LINEAR OPTICAL RECEIVERS

  • US 20170126190A1
  • Filed: 10/30/2015
  • Published: 05/04/2017
  • Est. Priority Date: 10/30/2015
  • Status: Active Grant
First Claim
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1. An optical communication system, comprising:

  • a photodiode configured to receive light energy and convert the light energy into an electrical signal;

    a first amplification stage that receives the electrical signal output by the photodiode and produces a first amplified output of the electrical signal received from the photodiode;

    a second amplification stage that receives the first amplified output of the first amplification stage and produces a second amplified output of the first amplified output received from the first amplification stage;

    a gain controller that controls a gain of the second amplification stage based on a control signal input to the second amplification stage; and

    at least one capacitive element that extends a bandwidth of the second amplified output at a maximum gain of the second amplification stage and also reduces a peaking of the second amplified output at a minimum gain of the second amplification stage.

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