Apparatus and method for direct phase digitizing

H - Electricity – 03 – D

Patent

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H03D 3/00 (2006.01) H03M 1/12 (2006.01) H04L 27/233 (2006.01) H04L 7/033 (2006.01)

Patent

CA 2101323

The present disclosure includes a discussion of a direct phase digitizing apparatus (303) for use in a radiotelephone (101). The direct phase digitizing apparatus (303) accepts a first analog signal (309) having a phase, a voltage range and a first frequency. First, the direct phase digitizer generates an estimated phase map (611) having a second frequency and N-bits of resolution. Second, the direct phase digitizer detects a predetermined-voltage crossing of the first analog signal (409). Third, using the predetermined-voltage crossings, the direct phase digitizer samples the estimated phase map. Fourth, a digital phase signal (623) is generated using the samples of the estimated phase map.

La présente divulgation décrit un appareil de numérisation de phases directes (303) utilisé dans un radiotéléphone (101). Cet appareil de numérisation de phases directes (303) reçoit un signal analogique (309) caractérisé par une phase, une gamme de tensions et une première fréquence. Le numériseur de phases directes produit premièrement une application de phases estimées (611) utilisant une seconde fréquence et une résolution de N bits. Deuxièmement, il détecte les points de croisement du signal analogique (409) avec une tension prédéterminée. Troisièmement, à l'aide de ces points de croisement, il échantillonne l'application de phases estimées. Quatrièmement, un signal de phase numérique (623) est produit à l'aide des échantillons de l'application de phases estimées.

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