Frequency quadrupler for anti-skid wheel speed sensor

Details Frequency quadrupler for anti-skid wheel speed sensor Frequency quadrupler for anti-skid wheel speed sensor

G - Physics

01

P

341/72, 340/148.

G01P 3/48 (2006.01) B60T 8/172 (2006.01) G05D 13/62 (2006.01)

Patent

CA 1065443

ABSTRACT OF THE DISCLOSURE Disclosed is a circuit for interconnection with a w??el speed transducer of the type which produces a charac- teristic sinusoidal output signal. The circuitry of the invention receives the sinusoidal output signal and rectifies the same by means of a precision rectifier. The precision rectifier has a feedback network to provide a gain; the gain being variable with frequency, input amplitude, and tempera- ture. The output of the precision rectifier is capacitively coupled to an operational amplifier having the inputs thereof biased with respect to each other. The operational amplifier produces an output signal on each transition of the full wave rectified signal through a particular level. These signals are in turn capacitively coupled to a monostable multivibrator which, responsive to the outputs of the opera- tional amplifier,produces output signals of fixed amplitude and pulse width.

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