H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 7/38 (2006.01)
Patent
CA 2303785
Disclosed are a method and a circuit configuration designed to compensate variations resulting from temperature, voltage and production by means of CMOS image sensors which are exposed to radiation and generate, depending on the radiation intensity, electrical output signals below a logarithmic curve. The inventive method comprises the following steps: at least two reference CMOS sensors, which are maintained at the same temperature as the CMOS image sensors to be compensated but are not irradiated, are used to generate two reference signals, one of which corresponds to a reference dark value and the other, as a result of electric power application thereupon, to a reference light value. The reference signals are amplified separately from each other in such a way that the amplification conditions are identical to those needed for amplifying the output signals to be compensated. Said reference signals are sent to an A/D converter with a thermal regime identical to that of the electrical output signals from the CMOS image sensors to be compensated. For each CMOS image sensor point at least one correction value is stored in a memory unit. The correction value, which enables variations resulting from temperature, voltage and production to be compensated, is fed into the system to correct the output signal to be compensated and obtain FPN=(fixed-pattern- noise)-corrected output signals. The FPN-corrected output signals and the reference signals received ared fed to the A/D converter, where the output signals from the CMOS image sensors are compensated and converted into digital signals. The circuit configuration according to the invention is so designed as to allow implementation of the method described.
L'invention vise à améliorer l'inscription d'appareils de télécommunication dans des stations de base pouvant être reliées auxdits appareils de télécommunication, dans des systèmes de télécommunication sans fil, notamment l'inscription d'unités mobiles DECT dans des stations de base DECT de systèmes DECT. A cet effet, toutes les stations de base émettant des messages radio, ayant fixé et transmis le bit "a44", sont mémorisées dans l'unité mobile comme jusqu'à présent, puis une procédure d'inscription connue est lancée au moyen d'une station de base sélectionnée selon des critères de réception prédéterminés. Si cette procédure d'inscription ne donne aucun résultat, cette station de base est marquée comme étant "non valable" et la même opération, y compris la procédure d'inscription, est effectuée avec une autre station de base. Selon l'invention, on tire profit du fait que, lors de l'inscription, un numéro d'identification personnel et/ou un code d'identification sont demandés. Si ce numéro d'identification personnel et/ou ce code d'identification sont faux, la demande d'inscription est rejetée. Dans le cas contraire, si ce numéro d'identification personnel et/ou ce code d'identification sont corrects, l'unité mobile est inscrite auprès de la station de base.
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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