Tunable Lp Filters with Zero Offset
نویسندگان
چکیده
It is necessary to improve the analog preprocessing dynamic range. Special problem consists in minimisation of the noise and offset. The use of a tunable low-pass filter brings usually problems with increasing of the offset and drift. The survey of standard solutions of these problems is shown and new solution of this problem too. This new way consists in using crossover, which divide frequency band to “CD” way and tunable passband. This structure enables using of any tunalble LP filter without its influence to offset and drift.
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