Patent ID: 8001993
Filing Date: 2011-08-23
Classification: F15B,F16K,H01F,Y10S,Y10T

Abstract:
1. A method comprising: receiving, at input circuitry, an input signal; multiplying the input signal by a first gain to generate a first modified signal; determining whether the first modified signal is within a range positioned around zero and in response to the first modified signal being within the range around zero, zeroing the first modified signal to generate a second modified signal; generating an intermediate signal, where the sign of the intermediate signal is based at least in part on the input signal; adding the intermediate signal to the second modified signal to create an output signal; and outputting, at output circuitry, the output signal, wherein the output signal is configured to be applied to a voice coil of an electronically controlled valve and the electronically controlled valve is configured to use the output signal to control movement of a valve member in the electronically controlled valve, the valve member including at least one land that overlaps an associated at least one opening, and wherein the at least one land is larger than an associated at least one opening such that a dead band is caused, and wherein the output signal is defined to reduce the dead band.