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Stochastic signal density modulation for optical transducer control

  • US 9,226,355 B1
  • Filed: 07/02/2013
  • Issued: 12/29/2015
  • Est. Priority Date: 11/13/2006
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a current supply coupled to a light source; and

    a controller coupled to the current supply including;

    a comparator comprising a first input, a second input and an output,a stochastic state machine, coupled to the first input of the comparator, to generate a plurality of stochastic values, anda signal density register, coupled to the second input of the comparator, to hold a signal density value,wherein the output of the comparator is based on a stochastic value of the plurality of stochastic values and the signal density value,wherein the controller is configured to provide a stochastic control signal to the current supply, the stochastic control signal to control a light intensity output of the light source.

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