Patent ID: 7366297
Filing Date: 2008-04-29
Classification: H04L

Abstract:
1. A method for converting alternating current voltage signals to Ethernet in-line power, the method comprising: rectifying the alternating current voltage signals to produce a rectified voltage signal; filtering a signal indicative of the rectified voltage signal to produce a filtered voltage signal; pulse width modulating a signal indicative of the filtered voltage signal and in conjunction adding at least one odd harmonic of a signal indicative of the rectified voltage signal to a signal indicative of the filtered voltage signal to produce a compensated voltage signal, thereby spreading the spectral content and reducing the size of valleys in the filtered voltage signal; filtering a signal indicative of the filtered voltage signal to produce an output direct current voltage signal; and detecting the presence of an Ethernet in-line power device and in response providing a signal indicative of the output voltage signal to the detected in-line power device.