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Voltage compensation in an irrigation control device

  • US 9,693,510 B2
  • Filed: 12/18/2013
  • Issued: 07/04/2017
  • Est. Priority Date: 12/18/2013
  • Status: Active Grant
First Claim
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1. An irrigation valve control apparatus comprising:

  • multiple terminals coupled with a multi-wire path;

    a first charge storage circuitry electrically coupled with at least one of the multiple terminals, wherein the first charge storage circuitry is configured to be charged by a voltage on the multi-wire path;

    a control circuitry configured to determine the voltage on the multi-wire path; and

    a boost circuitry controlled by the control circuitry, wherein the control circuitry in response to determining that the voltage on the multi-wire path is below a threshold activates the boost circuitry to increase a voltage stored by the first charge storage circuitry, wherein the boost circuitry comprises;

    a power inductor coupled with the first charge storage circuitry; and

    switching circuitry cooperated with the power inductor;

    wherein the control circuitry is configured to sequentially trigger the switching circuitry to induce a change in current over time through the power inductor producing a boost voltage applied to the first charge storage circuitry.

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