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Voltage level monitoring and indicating apparatus

  • US 4,445,090 A
  • Filed: 08/26/1981
  • Issued: 04/24/1984
  • Est. Priority Date: 08/26/1981
  • Status: Expired due to Fees
First Claim
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1. In a voltage level monitoring and indicating apparatus (10) including means (42) for displaying data representing a voltage magnitude of a voltage source, the improvement comprising:

  • means (20) for receiving a voltage level signal from said voltage source;

    a voltage to frequency converter (12) having an input (14) and an output (18), said input (14) being connected to said means (20), said converter (12) being constructed to produce a pulse frequency signal at said output (18) proportional to the magnitude of a first voltage level signal at said input (14);

    means (38) for receiving said pulse frequency signal and controlling said displaying means (42) in response to said received pulse frequency signal; and

    means (22) for automatically shifting the magnitude of a predetermined voltage level signal received from said voltage source to a signal having a magnitude equal to the magnitude of said first voltage level signal at said input (14).

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