Patent ID: 6307383
Filing Date: 2001-10-23
Classification: G01R

Abstract:
Apparatus for testing an inductive coil comprising:power supply means for providing a d.c. voltage and current flow;a circuit connected to the power supply means including:timing means for generating a frequency pulse train,means for multiplying the d.c. voltage in said circuit to generate a multiplied output, said means for multiplying the d.c. voltage including means for receiving said frequency pulse train,amplification means, coupled to said voltage multiplying means and adapted to receive the multiplied output, the amplification means adapted for amplifying the current across the inductive coil,a comparator for comparing an instantaneous voltage across the inductive coil to a reference voltage, andoutput means, coupled to said comparator, for producing a signal indicative of the state of the inductive coil; andmeans for connecting the inductive coil to said circuit to generate the instantaneous voltage.