Method and circuit configuration for processing the output signals of a rotational speed sensor
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United States of America Patent
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Aug 16, 1988
Grant Date -
N/A
app pub date -
Dec 2, 1986
filing date -
Dec 5, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To process the output signal of a rotational speed sensor (2) which generates an alternating voltage dependent in respect of frequency and amplitude on the rotational speed, two low-pass filters (TP1, TP2) serve to produce a useful signal (I1), on the one hand, and a reference signal (I2), on the other hand. The two signals are compared. In dependence on the difference of these signals (I1, I2) a pulse-shaped output signal, namely the processed sensor signal, is generated by means of a comparator (7). The reference signal dynamically follows the useful signal with the aid of a control signal issue by an adapter circuit (20,21).
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