Digital measuring circuit for measuring an electrical signal
First Claim
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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Accused Products
Abstract
The present invention relates to a measurement circuit for providing the digital value of an analog electrical signal. The digital measurement circuit for measuring an analog electrical signal produces a measurement signal (M) and includes an amplifier (1) which receives said electrical signal (I), followed by an analog-to-digital converter (2) which delivers digital data (N). The gain of the amplifier (1) is controlled by a control signal (C) and said gain can take up at least two values. The measurement circuit further includes a control unit (3) producing said control signal (C) and storing the digital data corresponding to different gain values, and includes means for producing the measurement signal (M) on the basis of said digital data (N).
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Citations
4 Claims
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1. A digital measurement circuit for measuring an analog electrical signal and producing a measurement signal, the measurement circuit comprising
an 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 by at least one analog-to-digital converter for converting the amplifier analog signal output by the amplifier into digital data the converter being followed by a 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 unit produces 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.
Specification