Active Filters

We develop and manufacture customer specific filters and time-continuous or time-discrete active filters.

As an example, a voltage-operated, configurable bandpass is subsequently described.

The filter QAF206 is a voltage-operated, configurable bandpass of sixth order in RC-technique. It consists of three filter-blocks of second order with high quality factor, with their center frequency voltage controlled, as well as an input- and an output-summer. A (bandpass) transfer function is realized by connecting external resistors. Nearly all functions of sixth order can be configured this way, e.g. Bessel-, Chebyshev- or Butterworth frequency response, as well as characteristics with two zeros like Cauer or inverse Chebysheff. The filter can of course also be used to realize transfer functions of second or fourth order.

Production to MIL-specifications possible.

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