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Combined back-up and battery low-level alarm for vehicle

  • US 7,123,133 B2
  • Filed: 04/15/2004
  • Issued: 10/17/2006
  • Est. Priority Date: 04/15/2004
  • Status: Expired due to Fees
First Claim
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1. A vehicle combined back-up and battery low-level alarm comprising:

  • a back-up alarm circuit;

    a voltage sensing and comparing circuit;

    a timing circuit; and

    a gating circuit;

    wherein the gating circuit performs tone generation output in response to inputs from the back-up alarm circuit, voltage sensing and comparing circuit, and the timing circuit;

    wherein the voltage sensing and comparing circuit is responsive to two different voltage thresholds, and there is different alarm mode timing for each respective threshold; and

    ,wherein the back-up alarm circuit has alarm mode precedence over the voltage sensing and comparing circuit.

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