Patent Document ID: 20030016021
Application ID: 09908478
Patent Flag: 0

Claim One:
1. A control circuit configuration for switching a voltage regulator in a vehicle electrical generator from a low power mode to a full voltage regulation mode in response to generator magnetic field rotation wherein a single phase of a three phase generator creates a voltage due to residual magnetism in the rotor, the control circuit configuration comprising: first filter means for eliminating high frequency noise in the voltage signal created in response to generator rotation providing a filtered signal; amplifier means for modifying the amplitude of the filtered signal; second filter means for eliminating the susceptibility of the signal to DC offset voltages; detection circuit means for establishing a triggering threshold for the twice filtered, amplified input voltage and determining an input waveform; and assessing means for assessing the input waveform and controlling voltage regulator transition from a low power mode to a full voltage regulation mode.