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Methods and systems for improving the duty cycle output of a vehicle speed sensor circuit

  • US 6,771,063 B2
  • Filed: 11/15/2001
  • Issued: 08/03/2004
  • Est. Priority Date: 11/15/2001
  • Status: Expired due to Fees
First Claim
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1. A vehicle speed sensing system, comprising:

  • a vehicle speed sensor circuit configured to provide at least one digital pulse output for every geartooth of a plurality of gearteeth thereof that passes by said vehicle speed sensor circuit;

    a counter circuit having a plurality of load pins, wherein said counter circuit is integrated with said vehicle speed sensor circuit, such that an output of said vehicle speed sensor circuit is divided by placing varying voltage values on at least one load pin of said plurality of load pins of said counter circuit; and

    at least two voltage sources that provide said varying voltage values, wherein said at least two voltage sources include at least one stimulus voltage source, which provides a substantially improved duty cycle output from said vehicle speed sensor circuit that is independent of an associated sensor duty cycle.

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