Device for measuring a signal having a very high noise level
AssigneeCompagnie Industrielle des Telecommunications Cit-Alcatel
InventorMichel Brouant
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Abstract
Device for measuring a signal having a very high noise level by an integrator circuit having an operational amplifier, characterized in that the device comprises a means for memorizing a voltage representative of the charge of the capacitor of the integrator circuit, a means for switching the voltage in the memory onto the integration capacitor to bring the voltage of that capacitor to a value close to the asymptotic integration value and a time base for controlling that switching and the reading of the final integration value.
Claims12
Device for measuring a signal with noise superimposed thereon comprising an integrator circuit including a resistor and a first capacitor connected with a first operational amplifier for providing an asymptotic integration value, means for memorizing a voltage which is representative of the charge of said first capacitor, multiplier circuit means, means for switching through said multiplier circuit means for voltage memorized by said memorizing means onto said first capacitor so as to bring the voltage of said first capacitor to a value approximate to the asymptotic integration value, whereby said integrator circuit approaches the asymptotic value in a shorter period of time.
Dependencies are inferred from the claim text.