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Digital measuring circuit for measuring an electrical signal

  • US 5,146,155 A
  • Filed: 12/27/1990
  • Issued: 09/08/1992
  • Est. Priority Date: 01/05/1990
  • Status: Expired due to Term
First Claim
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1. A digital measurement circuit for measuring an analog electrical signal and producing a measurement signal, the measurement circuit comprisingan amplifier for amplifying the analog electrical signal with a gain corresponding to the state of a control signal having at least two states, the amplifier being followed byat least one analog-to-digital converter for converting the amplifier analog signal output by the amplifier into digital data the converter being followed bya control unit having an input for receiving said digital data, a first output for providing said control signal and a second output for providing said measurement signal,wherein said control unitproduces during a signal measurement cycle said control signal in its at least two states, thereby causing the gain of the amplifier to successively assume each of said at least two states during the single measurement cycle,stores the values of said digital data output by the converter during the single measurement cycle that correspond to said at least two states, and calculates said measurement signal from said stored digital data values.

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