Patent ID: 6978011
Filing Date: 2005-12-20
Classification: H03H,H04L

Abstract:
1. An ADSL POTS splitter including an enhanced low pass filter, the enhanced low pass filter, comprising: a first filter capacitor including a first lead and a second lead; a first non-isolated inductor including a first winding and a second winding; a second non-isolated inductor connected to the first non-isolated inductor and including a first winding and a second winding, the first winding of the second non-isolated inductor connected in series with the first winding of the first non-isolated inductor, the second winding of the second non-isolated inductor connected in series with the second winding of the first non-isolated inductor; a isolated inductor connected to the first non-isolated inductor and including a first winding and a second winding, the first winding of the isolated inductor connected in series with the first winding of the first non-isolated inductor and to the first lead of the first filter capacitor, the second winding of the isolated inductor connected in series with the second winding of the first non-isolated inductor and to the second lead of the first filter capacitor, wherein the first non-isolated inductor has a respective DC saturation current and the isolated inductor has a respective DC saturation current, the DC saturation current of the first non-isolated inductor being substantially greater than the DC saturation current of the isolated inductor for achieving higher inductance in the isolated inductor, the isolated inductor being essentially the same physical size as than the first non-isolated inductor; and a common mode choke-connected between the first non-isolated inductor and the first filter capacitor, the common mode choke including a first winding and a second winding, the first winding of the common mode choke connected in series with the first winding of the first non-isolated inductor and with the first winding of the isolated inductor, the second winding of the common mode choke connected in series with the second winding of the first non-isolated inductor and with the second winding of the isolated inductor.