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AssigneeNational Instruments Corporation
InventorsChristopher G. Regier, Clayton Daigle
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A system and method, wherein the dielectric absorption of a capacitor is cancelled by a compensating circuit. One embodiment uses a compensation circuit comprising a compensating capacitor with substantially identical characteristics as the capacitor to be compensated in an integrator circuit. The effects of the dielectric absorption of the capacitor in the integrator circuit are reduced or eliminated because the dielectric absorption of the compensating capacitor cancels the dielectric absorption of the capacitor in the integrator circuit. Another embodiment uses compensation circuitry to reduce or eliminate the effects of dielectric absorption in any particular capacitor. The compensation capacitor in the compensation circuitry has a higher rate of dielectric absorption and a lower capacitance value than the capacitor whose dielectric absorption effects are to be reduced or eliminated. In another embodiment, the effects of the dielectric absorption of a capacitor are reduced or eliminated by choosing a compensation capacitor in the compensation circuitry with the same dielectric absorption as the capacitor to be compensated. The dielectric absorption of the compensation capacitor is scaled by the resistors in the compensation circuitry which determine the gain of the amplifier in the compensation circuitry.
A compensating circuit which compensates for dielectric absorption of a first capacitor in a first circuit, comprising:
A compensating circuit which compensates for dielectric absorption of a first capacitor, comprising:
A compensating circuit which compensates for dielectric absorption of a first capacitor in a first circuit, wherein the first capacitor exhibits dielectric absorption, wherein the compensating circuit is coupled to an input of the first circuit, wherein the compensating circuit receives an input voltage desired to be applied to the first circuit, wherein the compensating circuit includes a compensating capacitor which has similar dielectric absorption characteristics of the first capacitor, wherein the compensating capacitor is used in generating a dielectric absorption voltage, wherein the compensating circuit is operable to output a compensated voltage which is equal to the input voltage plus the dielectric absorption voltage, wherein the compensated voltage is input to the first circuit to compensate for the dielectric absorption of the first capacitor in the first circuit.
A circuit, comprising:
A method for compensating for dielectric absorption of a first capacitor in a circuit, the method comprising:
A circuit which compensates for dielectric absorption of a main capacitor, comprising:
A circuit which compensates for dielectric absorption of a main capacitor, comprising:
Dependencies are inferred from the claim text.