Wafer-stage temperature compensation for ic components

H - Electricity – 03 – F

Patent

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H03F 1/30 (2006.01)

Patent

CA 2204005

An integrated circuit has at least two components described in the form of two ideally matched transistors, each of which operate interdependently as a function of temperature and at least one physical parameter associated with each of said components when implemented in integrated form. The circuit further includes compensation means (Q9-Q16, R2-R4), disposed in the integrated circuit, for generating and applying a bipolar compensation signal (Isym) to at least one of said components (Q6) so that said two components interdependently operate predictably, consistently and independently of temperature variations and differences between the physical parameter of said two components. The bipolar current is necessary so that both the level and polarity of the compensation signal can be appropriately adjusted during the manufacture of the integrated circuit as a wafer so as to eliminate the need to compensate for any mismatches in the two components following such manufacture.

Un circuit intégré possède au moins deux composants décrits sous la forme de deux transistors adaptés de façon idéale, chacun d'eux fonctionnant en interdépendance en fonction de la température et d'au moins un paramètre physique associé à chacun de ces composants mis en oeuvre sous une forme intégrée. Le circuit comprend également des moyens de compensation (Q9-Q16, R2-R4), disposés à l'intérieur du circuit intégré, destinés à générer et à appliquer un signal de compensation bipolaire (Isym) à au moins un de ces composants (Q6) de sorte que ceux-ci fonctionnent en interdépendance de manière prévisible, cohérente et indépendamment des variations et des différences de température entre le paramètre physique de ces deux composants. Le courant bipolaire est nécessaire pour que le niveau et la polarité du signal de compensation puissent être ajustés de manière appropriée au cours de la fabrication du circuit intégré sous une forme de tranche, de façon qu'il n'y ait plus besoin d'éliminer d'éventuelles inadéquations dans les deux composants après cette fabrication.

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