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Self-adaptive current monitoring circuit having a voltage dividing unit for outputting an increased or decreased divided voltage signal according to a voltage regulation signal

  • US 10,459,009 B2
  • Filed: 01/15/2018
  • Issued: 10/29/2019
  • Est. Priority Date: 10/30/2017
  • Status: Active Grant
First Claim
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1. A self-adaptive current monitoring circuit, configured to monitor a current generated by an optical sensing element, the self-adaptive current monitoring circuit comprising a voltage dividing unit, a comparison unit, a threshold unit, and a voltage regulation unit;

  • the voltage dividing unit coupled with the optical sensing element, and the voltage dividing unit configured to generate a corresponding divided voltage signal according to a current signal of the optical sensing element;

    the comparison unit coupled with the voltage dividing unit, and the comparison unit configured to receive and generate a monitoring signal according to the divided voltage signal;

    the threshold unit coupled with the comparison unit, and the threshold unit configured to receive the monitoring signal and compare the monitoring signal with a threshold signal to output a switch control signal; and

    the voltage regulation unit coupled with the threshold unit and the voltage dividing unit, the voltage regulation unit configured to receive and generate a voltage regulation signal according to the switch control signal, and the voltage dividing unit receiving and outputting an increased or decreased divided voltage signal according to the voltage regulation signal.

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