An iterative method of recording analog signals

G - Physics – 11 – C

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G11C 27/00 (2006.01) G11C 29/44 (2006.01)

Patent

CA 2186141

Method and apparatus for adjustment and control of an iterative method of recording analog signals with on-chip trimming techniques for later playback. The invention allows setting of various parameters for the multi iterative programming technique after chip fabrication so as to allow tighter control and thus higher resolution analog signal sample storage in a given or minimum amount of time. Such parameters include, but are not limited to: the step down voltage [VSD] from the coarse programming cycle to the fine programming cycle, the incremental voltage increase between each fine pulse, the pulse width of each fine pulse, the number of fine pulses [Nf], the incremental voltage increase between each coarse pulse [VC], the pulse width of each coarse pulse, the number of coarse pulses [NC], and the offset [VOS], which stops further coarse pulses and holds the last coarse level as a reference for the following fine cycle.

L'invention concerne un procédé et un appareil d'ajustement et de commande d'un procédé itératif d'enregistrement de signaux analogiques utilisant une technique d'ajustement interne, pour un repassage ultérieur. L'invention permet la sélection de différents paramètres pour la technique de programmation multi-itérative après la fabrication des puces, de manière à permettre un contrôle plus étroit, et donc une mémorisation d'échantillons de signaux analogiques avec une résolution améliorée dans un intervalle de temps donné ou minimum. Parmi ces paramètres, on peut citer, sans que la liste ne soit limitative: l'abaissement de la tension (VSD) de programmation, du cycle de programmation grossière au cycle de programmation fine, l'augmentation incrémentielle de tension entre chaque impulsion fine, la largeur d'impulsion de chaque impulsion fine, le nombre d'impulsions fines (Nf), l'augmentation de tension incrémentielle (VC) entre chaque impulsion grossière, la largeur d'impulsion de chaque impulsion grossière, le nombre d'impulsions grossières (NC) et le décalage (VOS) qui arrête les impulsions grossières et garde le dernier niveau grossier comme référence pour le cycle fin suivant.

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