A wheel speed sensor input circuit with sensor status detection

Details A wheel speed sensor input circuit with sensor status detection A wheel speed sensor input circuit with sensor status detection

G - Physics

01

P

G01P 3/46 (2006.01) B60T 8/171 (2006.01) G01P 21/00 (2006.01) G01P 21/02 (2006.01)

Patent

CA 2105638

ABSTRACT OF THE DISCLOSURE A wheel speed sensor input circuit (2) with sensor status detection having a comparator (8) with a first input (8B) and a second input (8A) where both the first and second inputs (8B,8A) are connected to a wheel speed sensor (4) having electrical resistance where, when the status of the wheel speed sensor (4) is to be ascertained, the second input (8A) is connected to ground (15) through a diode (12A,12B,12C,12D) using a switching transistor (14) and the output of the comparator (8) is driven high or low depending on the speed sensor (4) electrical resistance where the output is high if the speed sensor (4) is operational.

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