Circuit arrangement for noise suppression

摘要

The circuit arrangement includes a passive filter circuit at an input, and a cooperator connected to the filter circuit, which provides a noise-reduced output signal. The filter circuit is formed as a band-pass filter, consisting of a passive high-pass filter and a low-pass filter with multiple stages connected in series. The low-pass filter consists of a number of identical, simple RC low-pass stages connected in series. The high-pass filter is pref. formed of an RC high-pass stage, whose capacitance is connected in series to the input of the circuit arrangement. The circuit arrangement is pref. included in an IC, and the capacitance of the high-pass filter is provided as an external component.