Method and circuit configuration for conditioning the output sig

Details Method and circuit configuration for conditioning the output sig Method and circuit configuration for conditioning the output sig

1993-06-24

1995-09-19

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324163, 364565, G01P 3481, G01P 346, G01P 348, H03K 508

Patent

active

054518679

ABSTRACT:
A circuit configuration which serves to condition the output signal of a rotational speed sensor, e.g., the wheel sensor of an automotive vehicle. The circuit configuration includes a trigger circuit, the "hysteresis" or trigger thresholds thereof being controllable, and includes circuits for determining a coupling factor which, multiplied by the frequency of the sensor signal corresponding to the speed of rotation, forms the amplitude of the sensor output signal. To determine the coupling factor, and to adjust the hysteresis, threshold values are predefined for the output signal of the rotational speed sensor. Upon start of the vehicle, the coupling factor is determined from the frequency of the sensor signal at the point of time the threshold values are reached, and the hysteresis is adjusted accordingly.

REFERENCES:
patent: 4575677 (1986-11-01), Dennis
patent: 4837508 (1989-06-01), Garnault
patent: 4894613 (1990-01-01), Tsugawa
patent: 5012207 (1991-04-01), Edwards
patent: 5101155 (1992-03-01), Oehler et al.
patent: 5274326 (1993-12-01), Bleckmann et al.

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