Device for the comparison of two resistors, and integrated resistor compensation system incorporating this device

Device for the comparison of two resistors, and integrated resistor compensation system incorporating this device

The present invention relates to a device for comparing the value of two resistors as well as to a system for the compensation of integrated resistors whose operating values may vary as a function of their environmental parameters, such as temperature and manufacturing quality. A device for the comp...

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1. Verfasser: Hasbani, Frédéric
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creator Hasbani, Frédéric
description The present invention relates to a device for comparing the value of two resistors as well as to a system for the compensation of integrated resistors whose operating values may vary as a function of their environmental parameters, such as temperature and manufacturing quality. A device for the comparison of two resistors is based upon analog information carried by currents. The device includes a measurement circuit for extracting the currents from the two resistors to be compared, and copies the currents to a parallel analog-digital converter that carries out the division of the extracted currents. The device converts the ratio of the extracted currents into a digital code that is the image of the ratio of the two resistors. The ratio is constantly re-updated as a function of environmental parameters of the circuit, such as the operating temperature. Also disclosed is a system for correcting the value of integrated compensated resistors. The system implements a device of this kind that does not use a reference voltage generator.
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A device for the comparison of two resistors is based upon analog information carried by currents. The device includes a measurement circuit for extracting the currents from the two resistors to be compared, and copies the currents to a parallel analog-digital converter that carries out the division of the extracted currents. The device converts the ratio of the extracted currents into a digital code that is the image of the ratio of the two resistors. The ratio is constantly re-updated as a function of environmental parameters of the circuit, such as the operating temperature. Also disclosed is a system for correcting the value of integrated compensated resistors. 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title Device for the comparison of two resistors, and integrated resistor compensation system incorporating this device
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