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首页> 外文期刊>IEEE Transactions on Automatic Control >A low-sensitivity programmable BJT current-mode filtering technique
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A low-sensitivity programmable BJT current-mode filtering technique

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摘要

A low-sensitivity temperature-compensated programmable BIT current-mode low-voltage filtering technique is proposed. We introduce a new technique in which the de gain and the location of the second pole of the integrator are controlled such thatthe Q-enhancement, due to the second pole, is canceled by the effect of finite dc gain. The technique is suitable for integration and can work with low-value capacitors. By making the filter time constant exactly proportional to reC, good lineartunability is achieved over many decades. The programming current is varied as proportional to absolute temperature (PTAT) to stabilize the time constant reC.

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