Patent ID: 7810125

Claim:
A wireless telephone communication system for a set top box, comprising: (A) a base unit connected to an AC power line for the transmission and receipt of control and data signals; and (B) a set top box configured to receive AC power, and control and data signals from the AC power line at an AC power line input; wherein the set top box further comprises a power input comprising a hot power input and a neutral power input, and configured to be electrically connected to an AC power line and to provide power and communication signals over the AC power line; a first inductor and a second inductor, each comprising a first end and a second end; a first capacitor connected between the second end of the first inductor and the second end of the second inductor, wherein no capacitor is connected directly between the first end of the first inductor and the first end of the second inductor; a power output comprising a hot power output and a neutral power output, and configured to provide power to a set top box power supply; a transformer comprising a first transformer connection point and a second transformer connection point, and configured to pass signals between the power input and a signal port comprising a transmit port and a receive port; and a second capacitor comprising a first end and a second end, wherein the first transformer connection point is electrically connected to a first end of the second capacitor, wherein the second end of the second capacitor is connected to the first end of the second inductor, wherein the second transformer connection point is connected to the first end of the first inductor, wherein the hot power input is electrically connected to the first end of the first inductor, and wherein the hot power output is electrically connected to the second end of the first inductor, and wherein the neutral power input is electrically connected to the first end of the second inductor, and wherein the neutral power output is electrically connected to the second end of the second inductor.