UEberwachungsschaltung fuer Frequenzaenderungen von Wechselstromsignalen

摘要

A control circuitry for anti-lock brake systems for wheeled vehicles. The control circuit comprises means for producing a waveform whose frequency is the same as that of an AC signal produced in response to wheel rotation, said waveform has a peak value which is a function of the instantaneous frequency of the AC signal. The control circuit can detect a predetermined rate of change of the wheel.